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    Question

    A boat covers 60 km downstream in 3 hours and 36 km

    upstream in 3 hours. Speed of the boat in still water is:
    A 18 km/h Correct Answer Incorrect Answer
    B 12 km/h Correct Answer Incorrect Answer
    C 16 km/h Correct Answer Incorrect Answer
    D 25 km/h Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Downstream speed = 60/3 = 20 km/h Upstream speed = 36/3 = 12 km/h Speed in still water = (20 + 12)/2 = 16 km/h

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