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    Question

    A boat can cover a distance of

    210 km downstream with the current in 5 hours. It takes an additional 2.5 hours to return the same distance upstream. What is the speed of the boat in still water?
    A 32 km/h Correct Answer Incorrect Answer
    B 45 km/h Correct Answer Incorrect Answer
    C 25 km/h Correct Answer Incorrect Answer
    D 35 km/h Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Downstream speed= 210/5 = 42 km/hr Upstream speed = 210/7.5 = 28 km/hr Speed of the boat in still water=(42+28)/2 = 70/2 = 35 km/hr

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