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Discussion :: Problems on Trains

  1. Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 sec. What is the length of the fast train?
    2. A.
    23 m
    B.
    23 2/9 m
    C.
    27 m
    D.
    27 7/9 m

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    Answer : Option D

    Explanation :

    Relative speed = (40 - 20) = 20 km/hr.

    = 20 * 5/ 18 = 50/9 m/sec.

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