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Discussion :: Problems on Trains

  1. Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is:

  2. A.

    30 km/hr

    B.

    45 km/hr

    C.

    60 km/hr

    D.

    75 km/hr

    View Answer

    Workspace

    Answer : Option C

    Explanation :

    Let the speed of the slower train be x m/sec.

    Then, speed of the faster train = 2x m/sec.

    Relative speed = (x + 2x) m/sec = 3x m/sec.

     [100+1008]   = 3x
     

     24x = 200

     x = 253   .
     
    So, speed of the faster train = 503   m/sec
     
       = [503     185]       km/hr    
         

       = 60 km/hr.


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