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    Question

    A boat covers 48 km downstream in 3 hours and 40 km

    upstream in 4 hours. What is the speed of the boat in still water?
    A 13 km/h Correct Answer Incorrect Answer
    B 17 km/h Correct Answer Incorrect Answer
    C 23 km/h Correct Answer Incorrect Answer
    D 37 km/h Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Downstream speed = 48 / 3 = 16 km/h Upstream speed = 40 / 4 = 10 km/h Speed of boat in still water = (16 + 10) / 2 = 26 / 2 = 13 km/h Hence, the correct answer is 13 km/h.

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