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    Question

    A man rows x km downstream and the same distance

    upstream in 16 hours. He can row 8x km downstream in 16 hours. How long will he take to row x km upstream?
    A 12 hrs Correct Answer Incorrect Answer
    B 14 hrs Correct Answer Incorrect Answer
    C 18 hrs Correct Answer Incorrect Answer
    D 11 hrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the downstream speed of the boat be тАШaтАЩ km/hr According to the question, (8x/a) = 16 Or, (x/a) = (16/8) Or, (x/a) = 2 = time taken to travel тАШxтАЩ km downstream Let the upstream speed of the boat be тАШbтАЩ km/hr Also, (x/a) + (x/b) = 16 Or, 2 + (x/b) = 16 Or, (x/b) = 14 hours

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