Multiple choice

Two trains are running at 60 km/hr and 90 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 18 seconds. What is the length of the slower train?

  1. 150 m.

  2. 200 m.

  3. 300 m

  4. Can't be determine.

  5. None of these.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Relative speed of fast train with respect to slow train = 90-60 = 30 km/hr = 30×5/18 = 25/3 m/s. In 18 seconds, distance covered = (25/3)×18 = 150 m. This is the length of the FAST train. The question asks for the length of the SLOWER train, which is not provided in the problem.

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