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Discussion :: Problems on Trains

  1. A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:
    2. A.
    45 km/hr
    B.
    50 km/hr
    C.
    54 km/hr
    D.
    55 km/hr

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    Answer : Option B

    Explanation :

    Speed of the train relative to man = (125/10) m/sec = (25/2) m/sec. [(25/2) * (18/5)] km/hr = 45 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr. x - 5 = 45 ==> x = 50 km/hr.

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