Question 5 - The fastest galloping horse can reach - Questions at the end of the chapter - Chapter 8 Class 7 - Measurement of Time and Motion (Curiosity)

Last updated at May 27, 2026 by

Q 5
Question
The fastest galloping horse can reach the speed of approximately 18 m/s. How does this compare to the speed of a train moving at 72 km/h?

🔗 Concept: 8.3 Speed

Horse at 18 m/s vs train at 72 km/h — convert and compare. Question 5 - The fastest gallopi - Measurement of Time an - [Teachoo] - Questions at the end of the chapter
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Train (20 m/s) is faster than the horse (18 m/s) by 2 m/s

Explanation

📋 Given
  • Horse speed = 18 m/s
  • Train speed = 72 km/h
🔄 Unit Conversion
  • Horse speed is in m/s. Train speed is in km/h.
  • Compare them in the same unit → convert train to m/s.
  • Divide km/h by 3.6 to get m/s.
📐 Conversion

m/s = km/h ÷ 3.6

Step 1 — Convert train speed to m/s
$$72 \text{ km/h} = \frac{72 \times 1000}{3600} = \boxed{20 \text{ m/s}}$$
Step 2 — Compare

Train = 20 m/s   >   Horse = 18 m/s.

$$\text{Difference} = 20 - 18 = \boxed{2 \text{ m/s}}$$
Train (20 m/s) > Horse (18 m/s) — train is faster by 2 m/s.
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