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    Question

    A man rows 240 km upstream in 5 hours and 360 km

    downstream in 5 hours. Find the time required to row 300 km in still water.
    A 4 hrs Correct Answer Incorrect Answer
    B 5 hrs Correct Answer Incorrect Answer
    C 6 hrs Correct Answer Incorrect Answer
    D 8 hrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Upstream speed = 240 / 5 = 48 km/h Downstream speed = 360 / 5 = 72 km/h Speed in still water = (48 + 72) / 2 = 60 km/h Required time = 300 / 60 = 5 hours

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