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Discussion :: Problems on Trains

  1. How many seconds will a 500 meter long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?
    2. A.
    25 sec
    B.
    28 sec
    C.
    30 sec
    D.
    35 sec

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    Answer : Option C

    Explanation :

    Let length of tunnel is x meter

    Distance = 800+x meter

    Time = 1 minute = 60 seconds 

    Speed = 78 km/hr = 78*5/18 m/s = 65/3 m/s

     Distance = Speed*Time

    800+x = (65/3) * 60

    800+x = 20 * 65 = 1300

    x = 1300 - 800 = 500 meters

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