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

  • question_answer
    A train 108m long moving at a speed of 50 km/h crosses a train 112m long coming from the opposite direction in 6 seconds. The speed of the second train is

    A)  48 km/h           

    B)  54 km/h

    C)  66 km/h           

    D)  82 km/h

    Correct Answer: D

    Solution :

    [d] Let the speed of the second train be x km/h The relative speed = (50 + x) km/h These trains will cross each other in a time equivalent of covering a distance equal to 108 + 112, i.e. 220 meters in 6 seconds, running a speed of (50 + x) km/h \[\therefore \] \[\frac{1}{50+x}\times \frac{220}{1000}=\frac{6}{3600}\] \[\Rightarrow \] \[x=82\] \[\therefore \] The speed of the second train = 82 km/h.

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