Lesson eLearning

At 10:00 AM, the sun is 50° above the horizon. After each hour, the sun's altitude decreases by 4°. What is its altitude at 3:00 PM?

hard 3 marks Class 4 · EVS · From the Window
Answer
30°

The correct answer is 30° — Thus the sun’s altitude at 3:00 PM is 30°.

Step-by-step solution

  1. Count the hours from 10:00 AM to 3:00 PM: 5 hours.
  2. Multiply the hourly decrease by the number of hours: 4° × 5 = 20°.
  3. Subtract this decrease from the initial altitude: 50° – 20° = 30°.
  4. Thus the sun’s altitude at 3:00 PM is 30°.
Common mistake: Miscounting the number of hours between times

Concept tested: Change in sun altitude over time

Published · How this solution was prepared and checked

← All From the Window questions