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    Question

    A boat can travel 15 km upstream and 21 km downstream in

    3 hours. Find the speed of the boat in still water if the speed of the stream is 1.5 km/h.
    A 12.5 km/h Correct Answer Incorrect Answer
    B 14.9 km/hr Correct Answer Incorrect Answer
    C 18.8 km/hr Correct Answer Incorrect Answer
    D 15.5 km/hr Correct Answer Incorrect Answer

    Solution

    Let the speed of the boat in still water be тАШxтАЩ km/h. Upstream speed = тАШx тАУ 1.5тАЩ km/h Downstream speed = тАШx + 1.5тАЩ km/h According to the question: Thus, the speed of the boat in still water is┬а 12.5 km/h .

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