Multiple choice

How long will a train, running at a speed of 45 kmph cross a standing man, given the length of the train is 450m?

  1. 100 sec

  2. 150 sec

  3. 50 sec

  4. 36 sec
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Speed = 45 km/hr = 45 * (5/18) m/s = 12.5 m/s. Time = distance / speed = 450 / 12.5 = 36 seconds.

AI explanation

To cross a standing man, the train must cover a distance equal to its own length. Converting the speed from kmph to m/s using the 5/18 factor gives 45 * (5/18) = 12.5 m/s. The time taken is calculated by dividing the distance by the speed: 450 m / 12.5 m/s = 36 sec.

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