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    Question

    A boat covers 36 km downstream in 2 hours, and it takes

    3 hours to cover the same distance upstream. What is the speed of the current?
    A 2 km/h Correct Answer Incorrect Answer
    B 3 km/h Correct Answer Incorrect Answer
    C 4 km/h Correct Answer Incorrect Answer
    D 5 km/h Correct Answer Incorrect Answer

    Solution

    Speed downstream = Distance / Time = 36/2 = 18 km/h. Speed upstream = Distance / Time = 36/3 = 12 km/h. Speed of current = (Speed downstream - Speed upstream) / 2 = (18 - 12) / 2 = 6/2 = 3 km/h. Correct Option: b

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