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    Question

    A boat can cover 120 km in upstream in 15 hours and 135

    km in Downstream in 5 hours. Find the speed of boat in still water.
    A 17.5 km/hr Correct Answer Incorrect Answer
    B 10.5 km/hr Correct Answer Incorrect Answer
    C 11.5 km/hr Correct Answer Incorrect Answer
    D 13.5 km/hr Correct Answer Incorrect Answer

    Solution

    Upstream speed of the boat = 120/15 = 8 km/hr Downstream speed of the boat = 135/5 = 27 km/hr Speed of boat in still water = (8 + 27)/2 = 17.5 km/hr

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