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Railways Quantitative Aptitude Boats & Streams Sample Paper Boats and Streams Sample Test Paper-14

  • question_answer
    The speed of a boat in still water is 8 km/nr. It can travel 20 km downstream at the same time as it can travel 12 km upstream, the rate of stream (in kmph) is

    A)  0.5                  

    B)  2

    C)  2.5                  

    D)  2.75

    Correct Answer: B

    Solution :

    [b] Let rate of stream = x kmph \[\therefore\] \[\frac{20}{8+x}=\frac{12}{8-x}\] 160 ? 20x = 36 + 12x 64 = 32x x = 2                                                                                \[\therefore\]  Rate of stream = 2 kmph


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