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    Question

    A boat can cover 170 km in downstream in 2 hours and 145

    km in upstream in 5 hours. Find the speed of boat in still water.
    A 57 km/hr Correct Answer Incorrect Answer
    B 10 km/hr Correct Answer Incorrect Answer
    C 25 km/hr Correct Answer Incorrect Answer
    D 65 km/hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Downstream speed of the boat = 170/2 = 85 km/hr Upstream speed of the boat = 145/5 = 29 km/hr Speed of boat in still water = (85 + 29)/2 = 57 km/hr

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