Lesson eLearning

The sun is at 90° above the horizon at noon. It decreases by 5° each hour after noon. What will be the angle of the sun at 2:00 pm?

medium 2 marks Class 4 · EVS · From the Window
Answer
80

The correct answer is 80 — Hence the angle at 2:00 pm is 80°.

Step-by-step solution

  1. From noon to 2:00 pm there are 2 hours.
  2. The sun's angle decreases by 5° per hour, so total decrease = 5° * 2 = 10°.
  3. Initial angle at noon = 90°.
  4. Subtract the decrease: 90° - 10° = 80°.
  5. Hence the angle at 2:00 pm is 80°.
Common mistake: Adding instead of subtracting

Concept tested: Sun's angle changes over time

Published · How this solution was prepared and checked

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