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SSC Quantitative Aptitude Boats & Streams Question Bank Train and Boat (I)

  • question_answer
    A boat has to travel upstream 20 km distance from point X of a river to point Y. The total time taken by boat in travelling from point X to Y and Y to X is 41 min 40 s. What is the speed of the boat?

    A) 66 km/h

    B) 72 km/h

    C) 48 km/h

    D) Cannot be determined

    Correct Answer: D

    Solution :

    [d] Let x be the speed of the boat and y be the speed of the current. \[\therefore \]    \[\frac{20}{x-y}+\frac{20}{x+y}=\frac{25}{36}\] In this equation there are two variables but only one equation. So, the value of 'x' cannot be determined.


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