Railways Quantitative Aptitude Trains Sample Paper Trains Sample Test Paper-13

  • question_answer
    Two trains running in opposite directions cross a man standing on the platform in 27 sec and 17 sec respectively. They cross each other in 23 sec. The ratio of their speeds is

    A)  1 : 2                

    B)  2 : 1

    C)  3 : 2                

    D)  2 : 3

    Correct Answer: C

    Solution :

    [c] Let the speeds of two trains be ?x? m/sec and ?y? m/sec respectively. Length of first train = 27x metres Length of second train = 17y metres \[\therefore \] \[\frac{27x+17y}{x+y}=23\] \[\Rightarrow \] \[27x+17y=23x+23y\] \[\Rightarrow \] \[4x=6y\] \[\Rightarrow \] \[\frac{x}{y}=\frac{3}{2}\] \[\Rightarrow \] \[x:y=3:2\]

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