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    Question

    A boat goes 24 km downstream in 3 hour and the same

    distance upstream in 6 hours. The speed of the boat in still water is:
    A 6 km/hr Correct Answer Incorrect Answer
    B 8 km/hr Correct Answer Incorrect Answer
    C 10 km/hr Correct Answer Incorrect Answer
    D 12 km/hr Correct Answer Incorrect Answer

    Solution

    Downstream speed = 24/3 = 8 km/hr Upstream speed = 24/6 = 4 km/hr Speed of the boat in still water = (D + U)/2 = (8+4)/2 = 6 km/hr 

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