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

  • question_answer
    The speed of a motor boat to that of the current of water is 36 : 5. The boat goes along with the current in 5 hours 10 minutes. It will come back in

    A)  5 hours

    B)  6 hours 15 min

    C)  6 hours 30 min

    D)  6 hours 50 min

    Correct Answer: D

    Solution :

    [d]        Let speed of boat = 36x km/h Speed of current = 5x km/h \[\therefore\] \[(36x+5x)\times \frac{310}{60}=\left( 36x-5x \right)\times t\] \[t=\frac{41\times 310}{60\times 31}=\frac{41}{6}=6H\,\,50\,\min\]


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