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    Question

    A boat can cover 176 km in downstream in 10 hours and

    140 km in upstream in 14 hours. Find the speed of boat in still water
    A 13.8 km/hr Correct Answer Incorrect Answer
    B 10.8 km/hr Correct Answer Incorrect Answer
    C 15.8 km/hr Correct Answer Incorrect Answer
    D 11.8 km/hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Downstream speed of the boat = 176/10 = 17.6 km/hr Upstream speed of the boat = 140/14 = 10 km/hr Speed of boat in still water = (17.6 + 10)/2 = 13.8 km/hr

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