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Discussion :: Problems on Trains

  1. The length of a train and that of a platform are equal. If with a speed of 90 k/hr, the train crosses the platform in one minute, then the length of the train (in meters) is:
    2. A.
    850
    B.
    525
    C.
    550
    D.
    750

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    Workspace

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    Answer : Option D

    Explanation :

    Speed = [90 * 5/18] m/sec = 25 m/sec; Time = 1 min. = 60 sec.

    Let the length of the train and that of the platform be x meters.

    Then, 2x/60 = 25 ¨ x = 25 * 60 / 2 = 750 

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