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    Question

    A boat can cover 176 km in downstream in 11 hours and

    150 km in upstream in 15 hours. Find the speed of boat in still water
    A 13 km/hr Correct Answer Incorrect Answer
    B 10 km/hr Correct Answer Incorrect Answer
    C 12 km/hr Correct Answer Incorrect Answer
    D 11 km/hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Downstream speed of the boat = 176/11 = 16 km/hr Upstream speed of the boat = 150/15 = 10 km/hr Speed of boat in still water = (16 + 10)/2 = 13 km/hr

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