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Discussion :: Problems on Trains

  1. A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?

    2. A.

    230 m
    B.

    240 m
    C.

    260 m
    D.

    320 m
    E.

    None of these

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    Answer : Option A

    Explanation :

    Relative speed = (120 + 80) km/hr

       = \([200 * \frac { 5 } {18 }] \)         m/sec
     
       = \([\frac { 500 } {9 } ]\)     m/sec.
     

    Let the length of the other train be x metres.

      Then , \(\frac { X +270 } { 9} \)   =\(\frac { 500 } {9 }\)  
       
     

     x = 230

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