Ratios and Proportions

122 questions

Question 61Question →

A supply sergeant is distributing 560560 pairs of cold-weather boots between two infantry companies (Company Alpha and Company Bravo) in a ratio of 3:43:4. How many MORE pairs of boots does Company Bravo receive than Company Alpha?

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Answer: 80

Answer

80
The correct approach is to first find the total number of parts in the ratio (3+4=73 + 4 = 7). Dividing the total 560560 boots by 77 reveals that each part represents 8080 boots. Since Company Bravo has 44 parts and Company Alpha has 33 parts, the difference is exactly 11 part, which equals 8080 boots.

Step-by-Step Solution

1
Calculate the total number of ratio parts.
3+4=73 + 4 = 7 total parts
To distribute the total amount according to the ratio, you first need to know how many equal parts the total is being divided into.
2
Determine the value of a single part.
560÷7=80560 \div 7 = 80 boots per part
Dividing the total number of boots by the total number of ratio parts gives the value of one equal share.
3
Find the difference in ratio parts between the two companies.
4−3=14 - 3 = 1 part difference
Instead of calculating both companies' totals and subtracting, it is more efficient to find the difference in their ratio shares directly.
4
Calculate the difference in the number of boots.
1×80=801 \times 80 = 80 boots
Multiplying the difference in parts by the value of one part gives the exact difference in the final item count.

Key Concept

Dividing a quantity in a given ratio involves finding the total number of parts, the value of one part, and then applying that unit value to answer the specific question asked.

Alternative Method

You can calculate each company's share individually first: Company Alpha receives 3×80=2403 \times 80 = 240 boots. Company Bravo receives 4×80=3204 \times 80 = 320 boots. Then, subtract the smaller share from the larger share: 320−240=80320 - 240 = 80 boots.
Estimated Time:1m 0s
Question 62Question →

A cybersecurity task force is composed of junior analysts and senior specialists in a ratio of 7:27:2. If the task force has a total of 126126 members, how many senior specialists are on the team?

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Answer: 2828

Answer

There are 2828 senior specialists on the team.
The correct answer is found by first adding the components of the ratio (7+2=97 + 2 = 9) to represent the entire task force. Next, divide the total number of members (126126) by 99 to determine that each ratio 'part' equals 1414 members. Finally, multiply this unit value by the 22 parts that represent the senior specialists (14×2=2814 \times 2 = 28).

Step-by-Step Solution

1
Determine the total number of parts in the given ratio.
7+2=97 + 2 = 9 total parts.
To find the value of a single part relative to the entire group, you must first know how many equal parts make up the whole.
2
Calculate the numerical value of one single part.
126÷9=14126 \div 9 = 14 members per part.
Dividing the total number of members by the total ratio parts gives the quantity represented by one unit.
3
Multiply the value of one part by the number of parts designated for senior specialists.
14×2=2814 \times 2 = 28 senior specialists.
The ratio states there are 22 parts of senior specialists for every 77 parts of junior analysts.

Key Concept

Calculating a specific part from a total quantity using a part-to-part ratio.
Question 63Question →

A naval supply officer is allocating a $4,500\$4,500 monthly discretionary budget among three ship departments—Deck, Engineering, and Operations—in a ratio of 4:5:64:5:6, respectively. Calculate the specific funding amounts based on this ratio.

Fill in the blanks below

The Engineering department will receive $\$,andtheOperationsdepartmentwillreceive, and the Operations department will receive \$$ more than the Deck department.
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Answer

The Engineering department receives $1,500\$1,500, and the Operations department receives $600\$600 more than the Deck department.
The total budget of $4,500\$4,500 is divided into 1515 equal parts (4+5+64 + 5 + 6). Each part is worth $300\$300 ($4,500÷15\$4,500 \div 15). The Engineering department receives 55 parts, which amounts to $1,500\$1,500 (5×$3005 \times \$300). The Operations department receives 66 parts and the Deck department receives 44 parts. The difference between them is 22 parts (6−46 - 4), which amounts to $600\$600 (2×$3002 \times \$300).

Step-by-Step Solution

1
Calculate the total number of parts in the ratio.
4+5+6=154 + 5 + 6 = 15 total parts.
The total budget must be divided by the sum of the ratio numbers to find the value of a single part.
2
Determine the monetary value of one part.
$4,500÷15=$300\$4,500 \div 15 = \$300.
This establishes the base unit value that can be multiplied by each department's respective ratio number.
3
Calculate the amount allocated to the Engineering department (second value in the ratio).
5×$300=$1,5005 \times \$300 = \$1,500.
This provides the answer for the first blank.
4
Calculate the difference between the Operations department (6 parts) and the Deck department (4 parts).
Difference in parts: 6−4=26 - 4 = 2 parts. Monetary difference: 2×$300=$6002 \times \$300 = \$600.
This provides the answer for the second blank without needing to calculate the full amounts for both departments.

Key Concept

Dividing a quantity in a given three-part ratio by finding the sum of the parts and the value of a single unit.
Question 64Question →

An operations chief needs to verify the hourly fuel consumption for a deployed mechanized unit. Match each asset's usage report to its calculated unit rate in gallons per hour.

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Items

A combat engineer vehicle consumes 350350 gallons over 1414 hours of clearing operations.
A utility helicopter burns 120120 gallons of aviation fuel during a 9090-minute flight.
A tactical field generator uses 4545 gallons during a 33-hour continuous run.
A cargo transport truck requires 144144 gallons to complete a 1212-hour convoy mission.

Matches

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Answer

Combat engineer vehicle matches to 25 gallons per hour; Utility helicopter matches to 80 gallons per hour; Tactical field generator matches to 15 gallons per hour; Cargo transport truck matches to 12 gallons per hour.
Each asset's fuel consumption rate is found by setting up a ratio of total gallons used to total hours operated, and then dividing to find the amount for exactly one hour. Any time given in minutes must be converted to hours to match the requested unit of 'gallons per hour'.

Step-by-Step Solution

1
Calculate the unit rate for the combat engineer vehicle.
350÷14=25350 \div 14 = 25 gallons per hour.
Unit rate is found by dividing the total quantity (gallons) by the total time (hours).
2
Calculate the unit rate for the utility helicopter.
9090 minutes is 1.51.5 hours. 120÷1.5=80120 \div 1.5 = 80 gallons per hour.
The rate requested is in gallons per hour, so minutes must first be converted to hours before dividing.
3
Calculate the unit rate for the tactical field generator.
45÷3=1545 \div 3 = 15 gallons per hour.
Unit rate is found by dividing the total quantity (gallons) by the total time (hours).
4
Calculate the unit rate for the cargo transport truck.
144÷12=12144 \div 12 = 12 gallons per hour.
Unit rate is found by dividing the total quantity (gallons) by the total time (hours).

Key Concept

Calculating unit rates by dividing a total quantity by a total elapsed time, ensuring units align correctly.
Question 65Question →

A refueling tanker transfers 450450 gallons of aviation fuel into an aircraft in 1515 minutes. What is the tanker's transfer rate in gallons per hour?

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Answer: 1,8001,800

Answer

The correct answer is 1,8001,800.
The correct transfer rate is found by determining how much fuel is pumped in one minute, which is 450÷15=30450 \div 15 = 30 gallons per minute. Since there are 6060 minutes in an hour, multiply this rate by 6060 to get 1,8001,800 gallons per hour.

Step-by-Step Solution

1
Find the unit rate in gallons per minute.
450÷15=30450 \div 15 = 30 gallons per minute.
This establishes the base rate of fuel transfer before scaling up to an hourly rate.
2
Convert the per-minute rate to a per-hour rate.
30×60=1,80030 \times 60 = 1,800 gallons per hour.
There are 60 minutes in an hour, so the minute rate must be multiplied by 60 to find the hourly rate.

Key Concept

Calculating unit rates and applying time conversions.
Estimated Time:1m 0s
Question 66Question →

A signal corps detachment has a continuous spool of tactical fiber optic cable that is 240240 meters long. A technician must cut the entire spool into three separate sections to establish command, perimeter, and relay links in a ratio of 2:3:52:3:5 respectively. What is the length of the shortest section in centimeters?

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Answer: 4,8004,800

Answer

4,8004,800
The correct answer is found by first converting 240240 meters to 24,00024,000 centimeters. Then, the ratio 2:3:52:3:5 is summed to find 1010 total parts. The shortest section corresponds to 22 parts. Taking 22 out of 1010 parts of 24,00024,000 centimeters gives 210×24,000=4,800\frac{2}{10} \times 24,000 = 4,800 centimeters.

Step-by-Step Solution

1
Convert the total length of the cable from meters to centimeters.
240 meters×100 cm/meter=24,000 cm240 \text{ meters} \times 100 \text{ cm/meter} = 24,000 \text{ cm}
The total length is given in meters, but the final question asks for the answer in centimeters.
2
Determine the total number of parts in the ratio.
2+3+5=10 total parts2 + 3 + 5 = 10 \text{ total parts}
To find the size of a single part, the ratio must be converted into a fraction of the whole.
3
Calculate the length of the shortest section.
24,000 cm×210=4,800 cm24,000 \text{ cm} \times \frac{2}{10} = 4,800 \text{ cm}
The shortest section corresponds to the smallest number in the ratio (22). Multiplying the total length by this fraction gives the length of that section.

Key Concept

To divide a quantity in a given ratio, first sum the parts of the ratio to find the total number of parts, then multiply the total quantity by the fraction representing the desired share. Always ensure units match the final question.

Alternative Method

You could also calculate the length of a single part first: 240240 meters divided by 1010 total parts is 2424 meters per part. The shortest section is 22 parts, making it 24×2=4824 \times 2 = 48 meters. Finally, convert 4848 meters to centimeters by multiplying by 100100, which gives 4,8004,800 centimeters.
Estimated Time:1m 15s
Question 67Question →

A communications platoon is distributing a shipment of 8,4008,400 replacement radio batteries among three forward operating bases (FOB Alpha, FOB Bravo, and FOB Charlie) in a ratio of 4:5:64:5:6, respectively. Based on this ratio, how many batteries will FOB Charlie receive?

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Answer: 3360

Answer

FOB Charlie will receive 3,360 batteries.
The total ratio parts sum to 15 (4 + 5 + 6). Dividing the total 8,400 batteries by 15 yields 560 batteries per part. FOB Charlie corresponds to the '6' in the ratio, so multiplying 560 by 6 gives the correct allocation of 3,360 batteries.

Step-by-Step Solution

1
Calculate the total number of ratio parts.
4+5+6=154 + 5 + 6 = 15 parts
To divide a total quantity in a specific ratio, you first need to determine the total number of equal parts that make up the whole.
2
Determine the amount of batteries in a single part.
8,400÷15=5608,400 \div 15 = 560 batteries per part
Dividing the total number of batteries by the total number of parts establishes the baseline value of one unit in the ratio.
3
Calculate FOB Charlie's share.
560×6=3,360560 \times 6 = 3,360 batteries
Since FOB Charlie receives 6 parts of the ratio, multiplying the value of a single part by 6 gives their final allocation.

Key Concept

To divide a quantity into a given ratio, find the total number of parts by summing the ratio values, divide the total quantity by this sum to find the value of one part, and then multiply by the desired part's ratio value.
Question 68Question →

A tactical communications array transmits 1,8001,800 megabytes of encrypted data in 4.54.5 minutes. At this constant rate, how many megabytes of data does the array transmit in 1818 seconds?

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Answer: 120

Answer

120
The correct answer is derived by first establishing the transmission rate of 400400 megabytes per minute (1,800÷4.51,800 \div 4.5). Since the required timeframe is given in seconds, it must be converted to minutes (18÷60=0.318 \div 60 = 0.3 minutes). Multiplying the rate by the converted time gives 120120 megabytes.

Step-by-Step Solution

1
Calculate the unit transmission rate in megabytes per minute.
1,800÷4.5=4001,800 \div 4.5 = 400 megabytes per minute
Finding the rate per minute allows for scaling the transmission amount to any other duration.
2
Convert the target time from seconds to minutes.
18÷60=0.318 \div 60 = 0.3 minutes
The established unit rate is in minutes, so the target time must match this temporal unit before multiplying.
3
Multiply the unit rate by the converted target time.
400×0.3=120400 \times 0.3 = 120 megabytes
Multiplying the rate (megabytes per minute) by the time (minutes) yields the total amount of data transmitted.

Key Concept

Calculating unit rates and applying time unit conversions (seconds to minutes) to solve for a specific quantity.
Question 69Question →

A military textile facility produces 1,2001,200 combat uniform shirts over a standard 55-day workweek. If the facility operates for a single 88-hour shift each day, what is the facility's production rate in shirts per hour?

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Answer: 3030

Answer

The facility's production rate is 3030 shirts per hour.
To find the hourly production rate, first determine the total hours worked by multiplying the number of days by the hours per shift (5 days×8 hours=40 hours5 \text{ days} \times 8 \text{ hours} = 40 \text{ hours}). Then, divide the total production by the total hours (1,200 shirts÷40 hours=30 shirts per hour1,200 \text{ shirts} \div 40 \text{ hours} = 30 \text{ shirts per hour}).

Step-by-Step Solution

1
Calculate the total number of hours the facility operated.
5 days×8 hours/day=40 hours5 \text{ days} \times 8 \text{ hours/day} = 40 \text{ hours}
To find the hourly rate, the total time must be expressed in hours.
2
Divide the total number of shirts produced by the total number of hours.
1,200÷40=30 shirts per hour1,200 \div 40 = 30 \text{ shirts per hour}
Dividing total quantity by total time yields the unit rate.

Key Concept

Unit Rates and Time Conversions
Question 70Question →

A shipyard damage control team is evaluating four auxiliary water pumps. Match each pump's performance test results to its calculated unit rate in gallons per minute (GPM).

Click a left item, then click its matching right item

Items

Pump Alpha: Removes 1,8001,800 gallons in 1212 minutes
Pump Bravo: Removes 3,5003,500 gallons in 2525 minutes
Pump Charlie: Removes 4,8004,800 gallons in 3030 minutes
Pump Delta: Removes 6,8006,800 gallons in 4040 minutes

Matches

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Answer

Pump Alpha matches 150150 GPM, Pump Bravo matches 140140 GPM, Pump Charlie matches 160160 GPM, and Pump Delta matches 170170 GPM.
Each pump's unit rate is determined by dividing the total gallons removed by the total number of minutes. This yields the uniform rate in gallons per minute (GPM).

Step-by-Step Solution

1
Calculate the unit rate for Pump Alpha.
1,800÷12=1501,800 \div 12 = 150 gallons per minute.
Dividing the total volume by the total time gives the unit rate.
2
Calculate the unit rate for Pump Bravo.
3,500÷25=1403,500 \div 25 = 140 gallons per minute.
Dividing the total volume by the total time gives the unit rate.
3
Calculate the unit rate for Pump Charlie.
4,800÷30=1604,800 \div 30 = 160 gallons per minute.
Dividing the total volume by the total time gives the unit rate.
4
Calculate the unit rate for Pump Delta.
6,800÷40=1706,800 \div 40 = 170 gallons per minute.
Dividing the total volume by the total time gives the unit rate.

Key Concept

Calculating unit rates by dividing a total quantity by the elapsed time to find the amount per single unit of time.
Question 71Question →

A combat engineer battalion is clearing debris from a damaged supply route. They are able to clear 1,8001,800 square feet of the route in 4545 minutes. Operating at this constant rate, what is the battalion's clearance rate in square feet per hour?

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Answer: 2,4002,400

Answer

The correct clearance rate is 2,4002,400 square feet per hour.
To find the hourly clearance rate, we can first determine the rate per minute: 1,8001,800 square feet divided by 4545 minutes gives 4040 square feet per minute. Since there are 6060 minutes in an hour, we multiply 4040 by 6060 to get 2,4002,400 square feet per hour. Alternatively, 4545 minutes is 0.750.75 hours, and 1,800÷0.75=2,4001,800 \div 0.75 = 2,400.

Step-by-Step Solution

1
Find the unit rate per minute by dividing the total area cleared by the total minutes.
1,800÷45=401,800 \div 45 = 40 square feet per minute
This establishes the base clearance rate in the provided time unit.
2
Convert the per-minute rate to a per-hour rate by multiplying by 6060.
40×60=2,40040 \times 60 = 2,400 square feet per hour
There are 6060 minutes in one hour, so multiplying the minute rate by 6060 gives the hourly rate.

Key Concept

Calculating unit rates and performing necessary unit conversions.
Estimated Time:1m 0s
Question 72Question →

A field kitchen consumes 1515 pounds of coffee over a 44-hour breakfast service. What is the unit rate of coffee consumption, in ounces per hour?

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Answer: 60

Answer

60
The unit rate is found by first converting the total weight into the requested units. Since 1 pound equals 16 ounces, 15 pounds is equal to 240 ounces. Dividing this 240 ounces by the 4 hours of service gives the correct unit rate of 60 ounces per hour.

Step-by-Step Solution

1
Convert the total coffee weight from pounds to ounces.
15×16=24015 \times 16 = 240 ounces
The question specifically asks for the rate in ounces per hour, and there are 16 ounces in 1 pound.
2
Calculate the unit rate by dividing the total ounces by the total hours.
240÷4=60240 \div 4 = 60 ounces per hour
A unit rate represents the quantity of one variable per single unit of another variable, found here by dividing total consumption by total time.

Key Concept

Calculating Unit Rates with Unit Conversions
Question 73Question →

A mobile water purification system can process 5,4005,400 gallons of water in 1.51.5 hours. What is the unit rate of water processed, in gallons per minute?

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Answer: 60

Answer

The correct unit rate is 60 gallons per minute.
The correct answer is found by first converting 1.51.5 hours to minutes (1.5×60=901.5 \times 60 = 90 minutes). Then, divide the total gallons by the total minutes to find the rate: 5,400÷90=605,400 \div 90 = 60 gallons per minute.

Step-by-Step Solution

1
Convert the given time from hours to minutes.
1.5 hours×60 minutes/hour=90 minutes1.5 \text{ hours} \times 60 \text{ minutes/hour} = 90 \text{ minutes}.
The question specifically asks for the unit rate in gallons per minute, so the time measurement must match.
2
Divide the total amount of water by the total number of minutes to find the unit rate.
5,400 gallons÷90 minutes=60 gallons per minute5,400 \text{ gallons} \div 90 \text{ minutes} = 60 \text{ gallons per minute}.
A unit rate represents the quantity of one variable for every single unit of another variable.

Key Concept

Calculating unit rates involving time conversions
Estimated Time:1m 0s
Question 74Question →

A logistics command is tracking the movement of four supply convoys traveling along different routes. Match each convoy's travel data to its correct average unit rate in miles per hour (mph).

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Items

Alpha Convoy: Travels 1515 miles in 2020 minutes
Bravo Convoy: Travels 9696 miles in 22 hours
Charlie Convoy: Travels 130130 miles in 2.52.5 hours
Delta Convoy: Travels 3535 miles in 4242 minutes

Matches

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Answer

Alpha Convoy travels at 45 mph, Bravo Convoy at 48 mph, Charlie Convoy at 52 mph, and Delta Convoy at 50 mph.
Each convoy's speed is found by dividing the total miles traveled by the total hours elapsed, carefully converting any minute values into fractional or decimal hours first.

Step-by-Step Solution

1
Calculate the unit rate for Alpha Convoy.
4545 mph
The time is given in minutes, so it must be converted to hours. 20 minutes=2060 hours=13 hours20 \text{ minutes} = \frac{20}{60} \text{ hours} = \frac{1}{3} \text{ hours}. Then, 15÷13=4515 \div \frac{1}{3} = 45 mph.
2
Calculate the unit rate for Bravo Convoy.
4848 mph
The time is already in hours. Simply divide distance by time: 96÷2=4896 \div 2 = 48 mph.
3
Calculate the unit rate for Charlie Convoy.
5252 mph
The time is in hours as a decimal. Divide distance by time: 130÷2.5=52130 \div 2.5 = 52 mph.
4
Calculate the unit rate for Delta Convoy.
5050 mph
Convert minutes to hours: 42 minutes=4260 hours=0.7 hours42 \text{ minutes} = \frac{42}{60} \text{ hours} = 0.7 \text{ hours}. Divide distance by time: 35÷0.7=5035 \div 0.7 = 50 mph.

Key Concept

Calculating unit rates (speed) by dividing distance by time, requiring unit conversion when time is given in minutes.
Estimated Time:2m 0s
Question 75Question →

An automated packaging system at a military supply center processes 4,5004,500 ration kits in 2.52.5 hours. What is the unit rate of the system in ration kits per minute?

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Answer: 30

Answer

30
To find the unit rate in kits per minute, the time must first be converted from hours to minutes. Since there are 6060 minutes in one hour, 2.52.5 hours is equivalent to 150150 minutes (2.5×60=1502.5 \times 60 = 150). Next, divide the total number of ration kits by the total number of minutes: 4,500÷150=304,500 \div 150 = 30. The system processes 3030 ration kits per minute.

Step-by-Step Solution

1
Convert the total time from hours to minutes.
2.5 hours×60 minutes/hour=150 minutes2.5 \text{ hours} \times 60 \text{ minutes/hour} = 150 \text{ minutes}
The question asks for the unit rate in kits per minute, so the given time must be in minutes.
2
Calculate the unit rate by dividing the total number of ration kits by the total time in minutes.
4,500÷150=30 kits per minute4,500 \div 150 = 30 \text{ kits per minute}
Unit rate is defined as the total quantity divided by the total time.

Key Concept

Unit Rates with Time Conversion
Question 76Question →

A high-capacity water pump transfers 840840 gallons of water in 1515 minutes. Operating at this exact constant rate, how many gallons of water will the pump transfer in 3.53.5 hours?

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Answer: 11,76011,760

Answer

The pump will transfer 11,760 gallons of water in 3.5 hours.
The problem describes a direct proportion between water volume and time. First, the unit rate is found by dividing 840840 gallons by 1515 minutes, which gives 5656 gallons per minute. Then, the target time of 3.53.5 hours is converted to 210210 minutes (3.5×603.5 \times 60). Multiplying the unit rate of 5656 gallons per minute by the 210210 minutes yields 11,76011,760 gallons.

Step-by-Step Solution

1
Find the unit rate of the pump in gallons per minute.
840÷15=56840 \div 15 = 56 gallons per minute.
To establish a common base rate that can be scaled to any duration.
2
Convert the target time from hours to minutes.
3.5×60=2103.5 \times 60 = 210 minutes.
Proportions require consistent units across all terms; the rate is in minutes, so the target time must also be in minutes.
3
Multiply the unit rate by the total number of minutes.
56×210=11,76056 \times 210 = 11,760 gallons.
To find the total volume transferred at the constant rate over the specified time period.

Key Concept

Direct Proportions

Alternative Method

Instead of finding the unit rate per minute, you can find the rate per hour. Since 15 minutes is 1/41/4 of an hour, multiply 840 by 4 to get 3,3603,360 gallons per hour. Then, multiply 3,3603,360 by 3.53.5 hours to get 11,76011,760 gallons.
Estimated Time:1m 0s
Question 77Question →

A medical logistics unit processes 3,6003,600 standard first-aid kits in 4545 minutes. What is the unit rate of processing in kits per hour?

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Answer: 4,800

Answer

The unit rate is 4,800 kits per hour.
To find the hourly unit rate, the processing time must be converted from minutes to hours, or the per-minute rate must be calculated and multiplied by 60. Processing 3,6003,600 kits in 4545 minutes equals 8080 kits per minute. Multiplying by 6060 minutes per hour gives the correct rate of 4,8004,800 kits per hour.

Step-by-Step Solution

1
Convert the processing time from minutes to hours.
45 minutes=4560 hours=0.75 hours45 \text{ minutes} = \frac{45}{60} \text{ hours} = 0.75 \text{ hours}
The question asks for the unit rate in kits per hour, so the time unit must match the requested rate.
2
Divide the total number of kits by the time in hours to find the unit rate.
3,6000.75=4,800 kits per hour\frac{3,600}{0.75} = 4,800 \text{ kits per hour}
A unit rate represents the ratio of the total quantity to the total time.

Key Concept

Calculating unit rates with time conversions
Question 78Question →

A base quartermaster is evaluating the fuel efficiency of four different portable power generators. Match each generator's fuel consumption data to its correct unit rate in gallons per hour.

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Items

Generator W: Consumes 1414 gallons of fuel every 44 hours
Generator X: Consumes 180180 gallons of fuel every 22 days
Generator Y: Consumes 2626 gallons of fuel every 44 hours
Generator Z: Consumes 99 gallons of fuel every 240240 minutes

Matches

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Answer

Generator W matches with 3.53.5 gallons per hour, Generator X matches with 3.753.75 gallons per hour, Generator Y matches with 6.56.5 gallons per hour, and Generator Z matches with 2.252.25 gallons per hour.
Each generator's fuel consumption is converted to an hourly rate by matching the time period into hours (e.g., 22 days to 4848 hours, 240240 minutes to 44 hours) and then dividing the total gallons consumed by the total hours.

Step-by-Step Solution

1
Calculate the unit rate for Generator W.
14÷4=3.514 \div 4 = 3.5 gallons per hour.
The rate is already given in hours, so divide the total gallons by the total hours.
2
Calculate the unit rate for Generator X by converting days to hours.
22 days = 4848 hours. 180÷48=3.75180 \div 48 = 3.75 gallons per hour.
The unit rate must be in gallons per hour, so the time must first be converted from days to hours.
3
Calculate the unit rate for Generator Y.
26÷4=6.526 \div 4 = 6.5 gallons per hour.
Divide the total volume of fuel by the given time in hours.
4
Calculate the unit rate for Generator Z by converting minutes to hours.
240240 minutes = 44 hours. 9÷4=2.259 \div 4 = 2.25 gallons per hour.
The unit rate must be in gallons per hour, so the time must first be converted from minutes to hours by dividing by 6060.

Key Concept

Calculating unit rates by ensuring equivalent units of measure before dividing the quantity by the time.
Question 79Question →

A supply depot crew loads 1,3501,350 cargo crates onto transport aircraft in 4.54.5 hours. Assuming a constant work pace, how many crates does the crew load per minute?

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Answer: 5

Answer

5
The correct unit rate is found by first converting 4.54.5 hours to minutes. Since there are 6060 minutes in an hour, 4.5×60=2704.5 \times 60 = 270 minutes. Then, dividing the total quantity of 1,3501,350 crates by the total time of 270270 minutes yields exactly 55 crates per minute.

Step-by-Step Solution

1
Convert the total time from hours to minutes.
4.5 hours×60 minutes/hour=270 minutes4.5 \text{ hours} \times 60 \text{ minutes/hour} = 270 \text{ minutes}
The question specifically asks for the unit rate in crates per minute, so the time must be in minutes.
2
Divide the total number of crates by the total time in minutes.
1,350 crates÷270 minutes=5 crates per minute1,350 \text{ crates} \div 270 \text{ minutes} = 5 \text{ crates per minute}
The unit rate is found by dividing the total quantity by the total time.

Key Concept

Calculating unit rates requiring a preceding time unit conversion.
Question 80Question →

A quartermaster issues 1,0501,050 uniform shirts to new recruits over the course of a 33-hour and 3030-minute processing block. Assuming a constant pace, what is the unit rate of shirts issued per minute?

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Answer: 5

Answer

The correct answer is 5 shirts per minute.
To find the unit rate in shirts per minute, the total time must first be converted entirely into minutes. 33 hours and 3030 minutes is equal to 210210 minutes. Dividing the total number of shirts (1,0501,050) by the total number of minutes (210210) results in exactly 55 shirts per minute.

Step-by-Step Solution

1
Convert the given time block into a single unit (minutes) to align with the question's requested rate.
33 hours and 3030 minutes =(3×60)+30=180+30=210= (3 \times 60) + 30 = 180 + 30 = 210 minutes.
The unit rate asked for is per minute, so the total time elapsed must be expressed in minutes.
2
Calculate the unit rate by dividing the total quantity by the total time in minutes.
1,050 shirts÷210 minutes=5 shirts per minute1,050 \text{ shirts} \div 210 \text{ minutes} = 5 \text{ shirts per minute}.
A unit rate compares a quantity to one unit of another quantity. Dividing the total items by the total minutes yields the number of items per single minute.

Key Concept

Calculating unit rates involving time conversion.
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Ratios and Proportions Practice Questions — Armed Services Vocational Aptitude Battery (ASVAB) — Page 4 | Examkin