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    Question

    A boat takes 3 hours to travel 24 km downstream and 4

    hours to travel 16 km upstream. What is the speed of the current?
    A 1 km/hr Correct Answer Incorrect Answer
    B 1.5 km/hr Correct Answer Incorrect Answer
    C 2 km/hr Correct Answer Incorrect Answer
    D 2.5 km/hr Correct Answer Incorrect Answer
    E 3 km/hr Correct Answer Incorrect Answer

    Solution

    Speed downstream = Distance/Time = 24/3 = 8 km/hr Speed upstream = Distance/Time = 16/4 = 4 km/hr Speed of current = (Downstream speed - Upstream speed) / 2 = (8 - 4) / 2 = 4/2 = 2 km/hr. Correct Option: c) 2 km/hr

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