Question

    A boy can swim in water with a speed of 12 km/hr in

    still water. If the speed of the stream is 4 km/hr, what will be the time taken by the boy to cover 64 km downstream?
    A 5 hours Correct Answer Incorrect Answer
    B 2 hours Correct Answer Incorrect Answer
    C 6 hours Correct Answer Incorrect Answer
    D 4 hours Correct Answer Incorrect Answer
    E 3 hours Correct Answer Incorrect Answer

    Solution

    Downstream Speed = (12 + 4) km/hr = 16 km/hr Time taken = 64/16 = 4 hours

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