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    Question

    A boat can cover 200 km in upstream in 10 hours and 220

    km in downstream in 4 hours. Find the speed of the stream.
    A 15.5 km/hr Correct Answer Incorrect Answer
    B 12.5 km/hr Correct Answer Incorrect Answer
    C 17.5 km/hr Correct Answer Incorrect Answer
    D 14.5 km/hr Correct Answer Incorrect Answer

    Solution

    Downstream speed = 220/4 = 55 km/hr Upstream speed = 200/10 = 20 km/hr Speed of stream = (55 – 20)/2 = 17.5 km/hr

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