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SSC Quantitative Aptitude Speed, Time and Distance Question Bank Speed Time and Distance (II)

  • question_answer
    The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 5 h, the speed of the first train is

    A) 70 km/h

    B) 200 km/h

    C) 250 km/h

    D) 350 km/h

    Correct Answer: A

    Solution :

    [a] Let the speed of first train be 7x km/h. Then, the speed of the second train is 8x km/h. But, speed of the second train \[=\frac{400}{5}\,km/h=80\,km/h\] \[\therefore \] \[8x=80\]\[\Rightarrow \]\[x=10\] Hence, the speed of first train is \[(7\times 10)\,km/h=70\,km/h.\]


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