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    Question

    A boat takes 14 hours to cover 196 km upstream and 7

    hours to cover the same distance downstream. Find the time taken by the boat to cover 168 km in still water.
    A 8 hours Correct Answer Incorrect Answer
    B 7 hours Correct Answer Incorrect Answer
    C 6 hours Correct Answer Incorrect Answer
    D 10 hours Correct Answer Incorrect Answer

    Solution

    Upstream speed of the boat = 196 ├╖ 14 = 14 km/h And downstream speed of the boat = 196 ├╖ 7 = 28 km/h So, speed of the boat in still water = {(28 + 14)/2} = 21 km/h So, required time = (168 ├╖ 21) = 8 hours┬а

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