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Multiple choice

A man observed that a train 120 m long crossed him in 9 seconds. The speed (in km/hr) of the train was

  1. 42

  2. 45

  3. 48

  4. 55

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Train length = 120 m, time to cross a man = 9 seconds. Speed = distance/time = 120/9 m/s = 40/3 m/s. Converting to km/h: (40/3) × (18/5) = 48 km/h. Option C matches.

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