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    Question

    The speed of a boat in still water is 7 km/hr and speed

    of current is 4 km/hr. If time taken to cover a certain distance upstream is 22 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

    Total distance = 22 × (7 – 4) = 66 km Required time = 66/(7 + 4) = 6 hrs

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