Examkin

Question

Difficulty: EasyDecimal Operations

A drone is flying at an altitude of 45.545.5 meters. It descends 12.7512.75 meters to take a photo, and then ascends 8.28.2 meters. What is the new altitude of the drone?

  1. 40.95 metersAnswer
  2. B
    24.55 meters
  3. C
    33.57 meters
  4. D
    50.05 meters

Answer

The new altitude of the drone is 40.95 meters.
The correct answer is found by sequentially subtracting the descent from the initial altitude (45.5−12.75=32.7545.5 - 12.75 = 32.75) and then adding the ascent (32.75+8.2=40.9532.75 + 8.2 = 40.95). Aligning the decimal points correctly ensures an accurate calculation.

Step-by-Step Solution

1
Identify the starting altitude and the mathematical operations for descending and ascending.
Starting altitude is 45.545.5 meters. Descending means subtracting (12.7512.75), and ascending means adding (8.28.2).
Translating the real-world scenario into a mathematical expression ensures the correct operations are applied in the correct sequence.
2
Subtract the descent distance from the initial altitude.
45.5−12.75=32.7545.5 - 12.75 = 32.75
This finds the drone's intermediate altitude after its initial descent.
3
Add the ascent distance to the intermediate altitude, making sure to align the decimal points.
32.75+8.20=40.9532.75 + 8.20 = 40.95
This calculates the final altitude after the drone moves back up.

Key Concept

Decimal Operations
Rate this question

Topics

Decimal Operations

More questions from this topic