Multiple choice

A train, 125 m long is running at a speed of 90 km/hr. How many seconds does it take to cross another train, 210 m long, standing on parallel track?

  1. 14.2 second

  2. 13.4 second

  3. 14.9 second

  4. 13.0 second
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = 90 km/hr = 25 m/s. Total distance to cover = length of moving train + length of stationary train = 125 + 210 = 335 m. Time = Distance/Speed = 335/25 = 13.4 seconds. Since the other train is stationary, relative speed is just the moving train's speed.

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