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    Question

    The speed of a boat in still water is 5 km/hr and speed

    of current is 2 km/hr. If time taken to cover a certain distance upstream is 14 hours, then how long will the boat take to cover the same distance downstream?
    A 6 hrs Correct Answer Incorrect Answer
    B 5 hrs Correct Answer Incorrect Answer
    C 2 hrs Correct Answer Incorrect Answer
    D 4 hrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed upstream = 5 - 2 = 3 km/hr Total distance covered = 14 × 3 = 42 km Speed downstream = 5 + 2 = 7 km/hr Required time = 42/(5 + 2) = 6 hrs

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