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Question 6221Question →

In transport geography, different modes of transportation exhibit distinct capital cost structures for terminal construction and maintenance. Arrange the following transportation modes in sequence from HIGHEST terminal costs to LOWEST terminal costs.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct sequence from highest terminal costs to lowest terminal costs is Air Transport, Water Transport, Rail Transport, and Road Transport.

Air transport incurs the highest terminal costs because airports require huge land areas, specialized high-strength runways, advanced navigation and control systems, and extensive passenger/cargo terminals. Water transport follows, as modern container ports require immense capital for harbor dredging, docks, piers, and heavy cargo-handling cranes. Rail transport ranks third, requiring dedicated freight marshalling yards and passenger stations. Road transport has the lowest terminal costs since vehicles can load and unload at simple depots, warehouses, or curbsides with minimal specialized terminal investment.

Step-by-Step Solution

Identify the high-capital terminal requirements of air and maritime transport.

Air transport stands at the top due to sophisticated technological, safety, and runway infrastructure, followed by water transport which requires extensive harbor dredging, dockyards, and container handling machinery.

Both air and water modes depend on complex, centralized nodes (airports and seaports) to operate.

Evaluate the terminal infrastructure requirements for land-based modes (rail and road).

Rail terminals require specialized freight yards and switching facilities, making their cost higher than road transport, which uses basic depots and flexible curbside spaces.

Road transport has high line-haul flexibility and minimal fixed terminal requirements compared to rail.

Arrange the modes in descending order of terminal expenditure.

Air Transport → Water Transport → Rail Transport → Road Transport.

This reflects the progression from most specialized and expensive fixed terminal facilities to the least specialized.

Key Concept

Terminal Cost Hierarchy in Transportation Geography

Question 6222Question →

Town X is located on longitude $15^\circ\text{E}$ . If the local time at the Greenwich Meridian ( $0^\circ$ ) is 12:00 noon, what is the local time at Town X?

1:00 pm

11:00 am

12:15 pm

2:00 pm

Show answer & explanation

Answer: 1:00 pm

Answer

The local time at Town X is 1:00 pm.

Earth rotates

360^\circ

in 24 hours, which means

15^\circ

equals 1 hour. Because Town X is located at

15^\circ\text{E}

, it is ahead of Greenwich (

0^\circ

) by 1 hour. Adding 1 hour to 12:00 noon gives 1:00 pm.

Step-by-Step Solution

Calculate the longitudinal difference between Greenwich Meridian (

0^\circ

) and Town X (

15^\circ\text{E}

15^\circ - 0^\circ = 15^\circ

The rate of Earth's rotation is

15^\circ

per hour (

360^\circ / 24\text{ hours} = 15^\circ/\text{hour}

Convert the longitudinal difference into time difference.

15^\circ \div 15^\circ/\text{hour} = 1\text{ hour}

Every

15^\circ

of longitude corresponds to a time difference of

1

hour.

Determine whether to add or subtract time based on direction relative to GMT.

12:00 noon + 1 hour = 1:00 pm.

Places located East of the Greenwich Meridian are ahead in time ('East gain, West lose').

Key Concept

Local time calculation using longitude differences and Earth rotation rate

Question 6223Question →

Ecosystems and human land-use patterns are strongly influenced by global atmospheric circulation and surface thermal regimes. Match each world climate type on the left with its defining meteorological mechanism and moisture characteristic on the right.

Click a left item, then click its matching right item

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Answer

Mediterranean Climate (Cs) pairs with summer drought under subtropical high subsidence; Tropical Monsoon Climate (Am) pairs with seasonal wind reversal and heavy summer rain; Mid-Latitude Steppe Climate (BSk) pairs with semi-arid continental interior conditions; Tundra Climate (ET) pairs with warmest month mean temperatures between

0^\circ\text{C}

and

10^\circ\text{C}

Each climate category is uniquely defined by its primary driver: Mediterranean (Cs) by subtropical high subsidence in summer; Tropical Monsoon (Am) by wind reversal; Mid-latitude Steppe (BSk) by continental rain shadows and distance from seas; and Tundra (ET) by polar air masses limiting summer temperatures to between

0^\circ\text{C}

and

10^\circ\text{C}

Step-by-Step Solution

Analyze the pressure system and precipitation dynamics for Mediterranean Climate (Cs).

Identified that Cs climates experience summer desiccation from sinking air in subtropical high-pressure belts and winter rain from rain-bearing westerlies.

Atmospheric pressure belt migration is the primary control for dry-summer subtropical climates.

Evaluate the atmospheric mechanism behind Tropical Monsoon Climate (Am).

Matched Am with seasonal land-sea wind shifts that supply heavy summer precipitation.

Monsoons are fundamentally driven by pressure gradients caused by thermal contrast between landmasses and oceans.

Examine the geographic location and moisture envelope of Mid-Latitude Steppe Climate (BSk).

Linked BSk with semi-arid continental interiors suffering from rain shadows and continentality.

Isolation from moisture-laden maritime air masses creates semi-arid grassland conditions in mid-latitudes.

Determine the thermal threshold for Tundra Climate (ET).

Paired ET with the polar thermal boundary of

0^\circ\text{C}

10^\circ\text{C}

mean temperature for the warmest month.

Köppen classification specifies

10^\circ\text{C}

as the upper mean temperature limit for tundra vegetation growth.

Key Concept

Köppen Climate Classification and Climatic Controls

Estimated Time:2m 0s

Question 6224Question →

Under the rules governing public sector accounting in Nigeria, which fund is specifically established to meet urgent and unforeseen expenditures for which no provision has been made in the Appropriation Act, pending legislative approval?

Contingencies Fund

Consolidated Revenue Fund

Capital Development Fund

Special Fund

Show answer & explanation

Answer: Contingencies Fund

Answer

Contingencies Fund

The Contingencies Fund is an emergency fund established by constitutional authority to provide immediate funds for urgent, unforeseen commitments when no other provision exists in the budget.

Step-by-Step Solution

Analyze the financial requirement specified in the question stem

The target fund must be designed for urgent, unbudgeted emergency expenses prior to supplementary appropriation.

Public sector accounting classifies government funds based on their statutory source, authorization, and usage constraints.

Evaluate government fund structures in public sector accounting

The Contingencies Fund allows the executive arm to disburse money for immediate needs during crises, which must later be recouped through a Supplementary Appropriation Act.

This preserves legislative control while ensuring immediate funding availability for emergencies.

Key Concept

Structure of Government Funds

Question 6225Question →

The easternmost point of the African mainland, Ras Hafun in Somalia, is located at approximately longitude $51^\circ\text{E}$ , while the westernmost point, Pointe des Almadies in Senegal, lies at approximately $17^\circ\text{W}$ . If the local solar time at Pointe des Almadies is 8:00 AM, what is the local solar time at Ras Hafun?

12:32 PM

3:28 AM

10:16 AM

5:44 AM

Show answer & explanation

Answer: 12:32 PM

Answer

12:32 PM

The total longitudinal interval spanning between

17^\circ\text{W}

(Senegal) and

51^\circ\text{E}

(Somalia) is

68^\circ

. At 4 minutes per degree of longitude, this equals a 272-minute difference, or 4 hours and 32 minutes. Because Somalia is situated east of Senegal, time is added to 8:00 AM, arriving at 12:32 PM.

Step-by-Step Solution

Calculate the total longitudinal separation between the two points across the Prime Meridian.

51^\circ\text{E} - (-17^\circ\text{W}) = 51^\circ + 17^\circ = 68^\circ

Because one point is in the Eastern Hemisphere and the other is in the Western Hemisphere, their longitudinal values must be added to find the total distance in degrees.

Convert the longitudinal difference into a time difference.

68^\circ \times 4\text{ minutes/degree} = 272\text{ minutes} = 4\text{ hours and } 32\text{ minutes}

The Earth rotates

360^\circ

in 24 hours, which equals

1^\circ

every 4 minutes.

Adjust the time based on direction of travel relative to the reference point.

8:00\text{ AM} + 4\text{ hours } 32\text{ minutes} = 12:32\text{ PM}

Places located farther east experience sunrise earlier, so time is added when moving east.

Key Concept

Longitudinal extent of Africa and time calculations across the Prime Meridian

Question 6226Question →

Africa exhibits a notable symmetrical pattern in its climatic zones extending both northward and southward from the equator. Which climatic zone lies directly adjacent to the central Equatorial climate belt?

Mediterranean climate

Tropical Continental (Savanna) climate

Desert (Arid) climate

Barometric pressure zone

Show answer & explanation

Answer: Tropical Continental (Savanna) climate

Answer

Tropical Continental (Savanna) climate

Because Africa is bisected almost equally by the equator, its climatic belts repeat in a near-mirrored latitudinal sequence. Directly bordering the central Equatorial climate belt to both the north and south is the Tropical Continental (Savanna) climate zone.

Step-by-Step Solution

Identify the central climatic zone of Africa

The equator passes near the center of Africa, making the Equatorial climate the central belt.

Climate zones in Africa radiate symmetrically north and south from the equator.

Determine the sequence of climate belts moving away from the equator

Moving outward from the Equatorial belt in both directions leads directly into the Tropical Continental (Savanna) climate belt, followed by Tropical Deserts, and finally Mediterranean climates at the coastlines.

Latitude and pressure belts dictate a mirrored climatic progression across the continent.

Key Concept

Equatorial symmetry of African climate zones

Estimated Time:45s

Question 6227Question →

Match each relief feature or slope type with the contour line pattern that uniquely describes its representation on a topographical map.

Click a left item, then click its matching right item

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Answer

Concave Slope pairs with closely spaced contours at higher elevations and widely spaced contours at lower elevations; Convex Slope pairs with widely spaced contours at higher elevations and closely spaced contours at lower elevations; Col (Saddle) pairs with a low pass between two peaks bounded by contour lines curving away on opposing sides; Escarpment (Cliff) pairs with contour lines merging along a steep vertical face.

The paired features match their exact cartographic representations: concave slopes are steeper at high elevations; convex slopes are steeper at low elevations; cols are pass features between summits; and escarpments display merged contours due to vertical cliffs.

Step-by-Step Solution

Analyze the gradient changes of concave and convex slope profiles.

A concave slope grows steeper with altitude (contours close together near the top), while a convex slope flattens out near the top (contours widely spaced near the top).

Contour spacing directly corresponds to terrain gradient; closer contours indicate steeper slopes.

Identify the structural contour representation of a col or saddle.

A col appears as a low point between two adjacent high areas where contours loop away from the center gap.

The neck between two peaks creates a characteristic hourglass-shaped contour arrangement.

Examine how extreme vertical drops are shown on topographic maps.

A cliff or escarpment has very small or zero horizontal distance between elevation changes, making contour lines run together or merge.

Vertical relief over negligible horizontal equivalent results in overlapping contour lines.

Key Concept

Contour Line Patterns and Relief Feature Identification

Question 6228Question →

Arrange the following geographic features and major infrastructure projects along the course of the Zambezi River in sequential order from its source to its ocean outlet.

Drag items to arrange them in the correct order

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Answer

The correct sequential order of the Zambezi River course from source to mouth is: Origin at Kalene Hill

\rightarrow

Plunge over Victoria Falls

\rightarrow

Impoundment at Kariba Dam

\rightarrow

Impoundment at Cahora Bassa Dam

\rightarrow

Discharge into the Mozambique Channel.

The Zambezi River flows generally eastward across Southern Africa. It originates at Kalene Hill in northwestern Zambia, proceeds south and east over Victoria Falls, flows into the artificial Lake Kariba created by Kariba Dam, continues east into Mozambique where it is impounded at Cahora Bassa Dam, and finally drains into the Mozambique Channel of the Indian Ocean.

Step-by-Step Solution

Identify the upper headwaters of the Zambezi River.

The river originates in the Zambian highlands at Kalene Hill (Mwinilunga District).

Every river course sequence begins at its highland source.

Locate the primary natural waterfall barrier along the upper-middle river section.

The river flows southward and eastward to plunge over Victoria Falls along the Zambia–Zimbabwe border.

Victoria Falls precedes any major reservoir downstream.

Determine the sequence of major man-made hydroelectric reservoirs (Kariba vs. Cahora Bassa).

The river enters Lake Kariba (Kariba Dam) first, then flows eastward across the border into Mozambique to feed Lake Cahora Bassa (Cahora Bassa Dam).

Kariba Dam lies further west (upstream) on the Zambia–Zimbabwe border, while Cahora Bassa Dam lies further east (downstream) in Mozambique.

Identify the final marine discharge outlet.

The river empties through its extensive delta into the Mozambique Channel (Indian Ocean).

The marine outlet represents the terminal mouth of the river system.

Key Concept

Course, Geomorphology, and Hydroelectric Infrastructure of the Zambezi River Basin

Estimated Time:2m 0s

Question 6229Question →

In Southeastern Nigeria, intense rainfall on fragile soils often leads to severe slope degradation and gully erosion. Which of the following statements correctly distinguishes between the initial weathering of rocks on these slopes and the mass wasting process that follows?

Weathering is the in-situ disintegration of rock materials without transport, whereas mass wasting is the downslope movement of rock and soil debris under the influence of gravity.

Mass wasting involves the in-situ chemical breakdown of rock surfaces, whereas weathering refers exclusively to large-scale soil movement carried by running water.

Weathering requires the active transportation of surface soil by wind or water, whereas mass wasting occurs entirely without any gravitational movement.

Weathering and mass wasting describe identical physical processes, but mass wasting takes place exclusively in coastal environments.

Show answer & explanation

Answer: Weathering is the in-situ disintegration of rock materials without transport, whereas mass wasting is the downslope movement of rock and soil debris under the influence of gravity.

Answer

Weathering is the in-situ disintegration of rock materials without transport, whereas mass wasting is the downslope movement of rock and soil debris under the influence of gravity.

Weathering involves the weakening and disintegration of rocks in place (in-situ) without moving them. Once rocks and soil are loosened, mass wasting takes place as gravity pulls the unattached earth materials down slopes, contributing to severe landscape degradation such as gullies in region like Southeastern Nigeria.

Step-by-Step Solution

Define weathering in physical geography

Identify that weathering refers to the static, in-situ (in place) breakdown or alteration of rocks and minerals by physical, chemical, or biological agents without significant transport.

Establishing the static nature of weathering isolates it from transport processes.

Define mass wasting in the context of slope degradation

Identify that mass wasting involves the bulk downward movement of soil, regolith, and rock debris under the direct force of gravity.

Gravity is the primary driving mechanism of mass wasting.

Compare the definitions to evaluate slope degradation mechanisms in Southeastern Nigeria

Distinguish between static rock breakdown (weathering) and gravity-driven movement down slopes (mass wasting).

This clear distinction directly addresses the core geography concept tested.

Key Concept

Distinction between Weathering and Mass Wasting

Estimated Time:45s

Question 6230Question →

Zenith Logistics Plc offered for public subscription $50,000$ ordinary shares of $\text{₦}2.00$ each at a premium of $15\%$ . If all the shares were fully subscribed and paid for, what total amount (in $\text{₦}$ ) will be credited to the Share Premium Account?

Show answer & explanation

Answer: 15000

Answer

The total amount credited to the Share Premium Account is ₦15,000.

The premium per share is

15\%

\text{₦}2.00

, which equals

\text{₦}0.30

. Multiplying this unit premium by the total

50,000

shares issued yields

\text{₦}15,000

, which is credited to the Share Premium Account.

Step-by-Step Solution

Calculate the share premium per share

Premium per share =

0.15 \times \text{₦}2.00 = \text{₦}0.30

Share premium represents the excess amount over the nominal (par) value of each share issued.

Multiply the premium per share by the number of shares issued

Total Share Premium =

50,000 \times \text{₦}0.30 = \text{₦}15,000

The total amount credited to the Share Premium Account is the unit premium multiplied by the total number of subscribed shares.

Key Concept

Accounting calculation for share premium upon issue of shares

Question 6231Question →

Match each telecommunication technology used in commercial communication with its primary business application.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Electronic Data Interchange (EDI) matches with automated paperless document transmission; Extranet matches with secure network access for external partners; Teleconferencing matches with real-time interactive remote meetings; Voice over Internet Protocol (VoIP) matches with routing voice calls over IP networks.

Each technology tool aligns directly with its commercial definition: EDI handles structured automated documents, Extranets secure partner access, Teleconferencing enables remote group meetings, and VoIP handles internet-based voice calls.

Step-by-Step Solution

Identify the primary function of Electronic Data Interchange (EDI).

EDI automates structured B2B transactions like purchase orders and invoices between systems.

EDI focuses on standardized document exchange between trading partners.

Distinguish between network types to classify Extranet.

An Extranet is a private network shared securely with external business entities.

Unlike an intranet (internal only) or internet (public), an extranet serves verified external stakeholders.

Define Teleconferencing in modern commercial practice.

Teleconferencing enables real-time remote audio/video meetings.

It allows organizational decision-makers across different cities or countries to hold live discussions.

Analyze Voice over Internet Protocol (VoIP).

VoIP converts audio signals into digital data packets sent over internet networks.

It replaces costly traditional telecom lines with data-based voice communication.

Key Concept

Classification of internet and telecommunication tools in modern business communication

Question 6232Question →

Match each weathering or mass wasting process in Column A with its correct driving mechanism or characteristic environment in Column B.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Carbonation pairs with chemical dissolution of carbonate rocks; Frost Shattering pairs with mechanical disintegration from freeze-thaw cycles; Solifluction pairs with slow downslope flow of water-saturated soil over permafrost; Rockfall pairs with rapid free-fall of detached bedrock fragments down steep cliffs.

Each weathering and mass wasting process matches its unique mechanism: Carbonation is a chemical reaction involving carbonic acid and limestone; Frost Shattering is physical breakdown caused by expanding ice in joints; Solifluction is saturated regolith moving slowly over permafrost; and Rockfall is direct gravitational free-fall down steep cliffs.

Step-by-Step Solution

Analyze chemical weathering processes

Carbonation involves rain absorbing carbon dioxide to form weak carbonic acid, which chemically dissolves limestone into soluble calcium bicarbonate.

Chemical weathering involves alterations to the chemical structure of minerals in rock.

Analyze mechanical weathering processes

Frost shattering operates purely mechanically as diurnal freeze-thaw cycles exert immense pressure inside joints and fissures.

Mechanical weathering breaks rocks into smaller fragments without changing mineral composition.

Differentiate between mass wasting types

Solifluction describes saturated soil creep over frozen permafrost, whereas rockfall describes extremely rapid free-fall movement under gravity.

Mass wasting processes are classified by movement velocity, material moisture, and environmental setting.

Key Concept

Distinction between Mechanical Weathering, Chemical Weathering, and Mass Wasting Mechanisms

Question 6233Question →

Match each Nigerian climatic zone listed on the left with its corresponding climatic characteristic on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Sub-equatorial Zone matches with heavy rainfall with a distinct double-peak; Tropical Continental Zone matches with very short rainy season (3–4 months) and high temperature range; Highland Zone matches with lower temperatures resulting from high elevation; Tropical Hinterland Zone matches with moderate rainfall with a single maximum.

Each zone is correctly paired according to geographical controls: coastal sub-equatorial zones feature double-peak rainfall; far northern sub-Sahelian areas have brief wet seasons; highland regions have elevation-induced temperature drops; and middle belt hinterlands experience single-peak seasonal rainfall.

Step-by-Step Solution

Identify coastal climate characteristics

Southern coastal regions have sub-equatorial climate with double rainfall maxima due to long exposure to the Maritime Tropical (mT) air mass.

Coastal proximity ensures prolonged moisture supply.

Identify northern continental climate characteristics

Far northern regions experience short rain periods (3-4 months) and a high annual temperature range due to dominant Continental Tropical (cT) air mass.

Distance from the ocean limits moisture availability.

Identify highland relief climate characteristics

Elevated areas like the Jos Plateau have cooler conditions due to lapse rate reduction of temperature with altitude.

Altitude modifies temperature independently of latitude.

Identify middle belt hinterland climate characteristics

Middle belt receives moderate rainfall with a single peak around July/August as the ITCZ advances and retreats.

Transition zone between wet south and dry north.

Key Concept

Climatic Zones of Nigeria and their distinguishing characteristics

Question 6234Question →

Which of the following financial instruments is traded on the capital market to raise long-term debt capital for a company?

Debentures

Treasury Bills

Commercial Papers

Banker's Acceptances

Show answer & explanation

Answer: Debentures

Answer

Debentures are long-term debt securities traded on the capital market to secure long-term loan funds for corporate enterprises.

Debentures are long-term debt instruments issued by public limited companies to borrow capital from the investing public through the capital market, making them the correct choice.

Step-by-Step Solution

Identify the market type and tenure requested

The target instrument must operate in the capital market for long-term debt financing.

The capital market specializes in medium- and long-term funds, whereas the money market deals in short-term debt.

Evaluate the financial instruments listed

Treasury Bills, Commercial Papers, and Banker's Acceptances are short-term money market instruments, whereas Debentures represent long-term debt securities.

Debentures carry fixed interest payments and mature over longer time horizons exceeding one year.

Key Concept

Capital Market Instruments vs Money Market Instruments

Question 6235Question →

In a semi-arid valley region, rural homesteads were historically clustered along a narrow belt corresponding to a geological spring line at the contact zone between permeable limestone and impermeable clay strata. Following recent regional development, newer residential structures have aligned continuously along a newly paved highway traversing the valley floor. Which sequence of settlement determinants correctly accounts for the original historical pattern and the newly emerging layout respectively?

A wet-point physical site factor dictated by groundwater availability, transitioning to a linear cultural-technological pattern driven by transport accessibility.

A dry-point physical site factor dictated by seasonal flood avoidance, transitioning to a nucleated market pattern driven by agricultural commercialization.

A defensive physical situation factor dictated by valley topography, transitioning to a dispersed agrarian pattern driven by land fragment consolidation.

A socio-economic pull factor dictated by customary land tenure, transitioning to a wet-point drainage pattern driven by river basin canalization.

Show answer & explanation

Answer: A wet-point physical site factor dictated by groundwater availability, transitioning to a linear cultural-technological pattern driven by transport accessibility.

Answer

The transition is driven first by a wet-point physical site factor dictated by groundwater availability along the spring line, followed by a linear settlement pattern driven by transport accessibility along the highway corridor.

In semi-arid landscapes, settlement near spring lines is governed by water availability, making it a classic wet-point physical site factor. When infrastructure develops, buildings line up along transport routes to maximize accessibility and commercial opportunities, forming a classic linear settlement pattern.

Step-by-Step Solution

Analyze the historical settlement location along the geological spring line

Settlement alignment along a spring line (permeable meeting impermeable strata) in a semi-arid zone indicates a wet-point site where water supply determines house location.

In dry environments, localized water access is the primary physical constraint governing rural site selection.

Analyze the newly emerging settlement layout along the paved highway

Buildings growing sequentially along a transportation axis form a linear (or ribbon) settlement pattern determined by infrastructure accessibility.

Modern transportation routes attract settlement due to trade, mobility, and ease of access to markets.

Synthesize the temporal transition between settlement determinants

The shift represents a evolution from physical site constraints (wet-point) to socio-economic infrastructure drivers (linear transport orientation).

Technological and infrastructure developments allow human populations to overcome localized natural physical site limitations.

Key Concept

Interaction of physical site factors (wet-point spring lines) and economic infrastructure determinants (transport corridors) in shaping rural settlement patterns.

Estimated Time:2m 0s

Question 6236Question →

Prior to reconciliation, the Sales Ledger Control Account of Folake Enterprises showed a debit balance of ₦540,000 on 31 December 2025. Upon auditing the books, the following errors were discovered:

1. The sales journal total was understated by ��9,000.
2. A customer's dishonoured cheque of ₦14,000 recorded in the cash book was not posted to the control account.
3. A contra set-off of ₦6,000 between the sales and purchases ledgers was omitted from the control account.
4. Total discount allowed of ₦3,500 was wrongly posted to the debit side of the control account.

What is the correct adjusted balance of the Sales Ledger Control Account?

Show answer & explanation

Answer: 550000

Answer

The correct adjusted balance of the Sales Ledger Control Account is ₦550,000.

The unadjusted debit balance of ₦540,000 is increased by ₦9,000 for understated sales and ₦14,000 for the dishonoured cheque, and decreased by ₦6,000 for the omitted contra entry and ₦7,000 for correcting the misposted discount allowed (deducting ₦3,500 to reverse the wrong debit and ₦3,500 to credit it properly). This yields an adjusted debit balance of ₦550,000.

Step-by-Step Solution

Identify initial balance and direction

Unadjusted debit balance = ₦540,000

The Sales Ledger Control Account normally carries a debit balance representing total trade debtors.

Adjust for understated sales journal total

Add ₦9,000 to debit balance

Understating sales means total debtors were understated; increasing sales increases the control account debit.

Adjust for dishonoured cheque

Add ₦14,000 to debit balance

A dishonoured cheque reinstates the debtor's debt, requiring a debit entry in the Sales Ledger Control Account.

Adjust for omitted contra entry

Deduct ₦6,000 from debit balance

Contra set-offs reduce amounts owed by debtors against amounts owed to them as creditors, requiring a credit entry.

Correct misposted discount allowed

Deduct ₦7,000 from debit balance

Discount allowed reduces debtors (credit side). Debiting ₦3,500 requires a credit adjustment of ₦7,000 (₦3,500 to cancel the error plus ₦3,500 for the correct posting).

Compute total adjusted balance

540,000 + 9,000 + 14,000 - 6,000 - 7,000 = ₦550,000

Summing all debit additions and credit deductions yields the true adjusted control balance.

Key Concept

Adjustment of Sales Ledger Control Account for Errors and Omissions

Question 6237Question →

A geographer is constructing a statistical map using proportional circles to represent agricultural output across regions. Region A produced $100{}000\text{ metric tonnes}$ of cassava and is drawn with a circle radius of $1.5\text{ cm}$ . If Region B produced $400{}000\text{ metric tonnes}$ of cassava, what is the correct radius required for the circle representing Region B?

3.0\text{ cm}

6.0\text{ cm}

0.75\text{ cm}

4.5\text{ cm}

Show answer & explanation

Answer: $3.0\text{ cm}$

Answer

The radius required for the circle representing Region B is

3.0\text{ cm}

For proportional circle maps, the visual area of each symbol must be directly proportional to the magnitude of the data represented (

A \propto V

). Since the area of a circle is

A = \pi r^2

, the radius

r

is proportional to the square root of the statistical value (

r \propto \sqrt{V}

). The output ratio between Region B and Region A is

400{}000 / 100{}000 = 4

. The square root of this ratio gives a radius scale factor of

\sqrt{4} = 2

. Multiplying Region A's circle radius of

1.5\text{ cm}

2

gives

3.0\text{ cm}

Step-by-Step Solution

Calculate the ratio of the quantities represented by the two regions

Data Value Ratio =

\frac{400{}000}{100{}000} = 4

Determining how many times larger Region B's output is compared to Region A.

Apply the proportional symbol area scaling formula (

r \propto \sqrt{V}

)

Radius Scale Factor =

\sqrt{4} = 2

Because a circle's area is proportional to the statistical value (

A \propto V

), the radius must scale with the square root of the value ratio.

Calculate the required radius for Region B

Radius =

1.5\text{ cm} \times 2 = 3.0\text{ cm}

Multiplying the base radius of Region A by the radius scale factor.

Key Concept

Proportional Symbol Map Scaling (Square Root Radius Rule)

Question 6238Question →

A regional transportation network connects $6$ major urban centers (vertices) using $9$ direct highway corridors (edges). What is the Beta index of connectivity for this transport network?

1.50

0.67

3.00

0.50

Show answer & explanation

Answer: $1.50$

Answer

The Beta index of connectivity for the transport network is

1.50

The Beta index (

\beta

) measures the simple connectivity of a transportation network using graph theory. It is computed as

\beta = \frac{\text{edges}}{\text{vertices}}

. With

9

edges and

6

vertices,

\beta = \frac{9}{6} = 1.50

. A Beta index greater than

1.0

indicates a connected network with circuits.

Step-by-Step Solution

Identify the number of vertices (

v

) and edges (

e

) in the transport network.

v = 6

(urban centers) and

e = 9

(highway corridors).

Topological graph metrics rely on identifying the basic structural components of a network.

Apply the Beta index formula for network connectivity.

\text{Beta index } (\beta) = \frac{e}{v}

The Beta index evaluates simple network connectivity by measuring the average number of edges per vertex.

Substitute the values into the formula and calculate.

\beta = \frac{9}{6} = 1.50

Dividing

9

6

gives

1.50

, indicating a moderately connected network.

Key Concept

Topological Network Connectivity Metrics (Beta Index)

Question 6239Question →

Bisi Traders purchased a new generator for office use worth $\text{₦}350,000$ on credit from Mikano Motors. Which of the following entries correctly records this transaction in the General Journal?

Debit Office Equipment account

\text{₦}350,000

; Credit Mikano Motors account

\text{₦}350,000

Debit Purchases account

\text{₦}350,000

; Credit Mikano Motors account

\text{₦}350,000

Debit Mikano Motors account

\text{₦}350,000

; Credit Office Equipment account

\text{₦}350,000

Debit Capital account

\text{₦}350,000

; Credit Mikano Motors account

\text{₦}350,000

Show answer & explanation

Answer: Debit Office Equipment account $\text{₦}350,000$ ; Credit Mikano Motors account $\text{₦}350,000$

Answer

Debit Office Equipment account

\text{₦}350,000

; Credit Mikano Motors account

\text{₦}350,000

Purchasing a non-current asset on credit is a special transaction recorded in the General Journal. The Office Equipment account is debited to reflect the increase in business assets, and Mikano Motors account is credited to acknowledge the creditor liability.

Step-by-Step Solution

Determine the appropriate book of original entry for the transaction

The credit purchase of a fixed asset (generator/office equipment) must be recorded in the General Journal (Journal Proper).

The Purchases Day Book is strictly meant for goods bought for resale on credit. Non-current assets bought on credit are recorded in the General Journal.

Apply double-entry rules for the credit purchase of a non-current asset

Debit Office Equipment account

\text{₦}350,000

and Credit Mikano Motors account

\text{₦}350,000

Debit the account that receives the asset (increase in assets) and credit the account of the supplier who gives value on credit (increase in liability).

Key Concept

Recording credit purchases of non-current assets in the General Journal

Question 6240Question →

In the study of African transport networks and regional trade corridors, landlocked countries depend on specific transit routes and coastal gateways for foreign trade. Which of the following correctly pairs a landlocked African nation with its principal transit corridor and associated seaport?

Niger Republic — Cotonou Corridor terminating at the Port of Cotonou

Mali — Maputo Corridor terminating at the Port of Maputo

Zambia — Dakar Corridor terminating at the Port of Dakar

Chad — Northern Corridor terminating at the Port of Mombasa

Show answer & explanation

Answer: Niger Republic — Cotonou Corridor terminating at the Port of Cotonou

Answer

Niger Republic — Cotonou Corridor terminating at the Port of Cotonou

Niger Republic is located in West Africa and relies primarily on the Cotonou transit corridor traversing Benin Republic to access maritime shipping at the Port of Cotonou.

Step-by-Step Solution

Identify the regional location of each landlocked African nation

Niger Republic and Mali are in West Africa, Zambia is in Southern Africa, and Chad is in Central Africa.

Establishing correct sub-regional geography is necessary for matching inland nations with their regional transit infrastructure.

Trace the primary transit corridor and port access for each landlocked nation

Niger Republic's main maritime trade route runs through Benin to the Port of Cotonou. Mali uses Dakar (Senegal) and Abidjan (Côte d'Ivoire). Zambia uses routes to Dar es Salaam, Beira, or Walvis Bay. Chad relies on Douala (Cameroon).

Transit corridors are established along geographic proximity and regional trade agreements.

Determine the accurate nation-corridor-port pairing

The pairing of Niger Republic with the Cotonou Corridor terminating at the Port of Cotonou is geographically and economically valid.

It accurately connects a landlocked West African state with its primary coastal gateway.

Key Concept

Hinterland trade corridors and seaport access for landlocked African nations

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