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    Question

    A boat moving upstream takes 8 hours 48 minutes to cover

    a distance while it takes 4 hours to return to the starting point, downstream. What is the ratio of the speed of boat in still water to that of water current?
    A 3 : 2 Correct Answer Incorrect Answer
    B 4 : 3 Correct Answer Incorrect Answer
    C 8 : 3 Correct Answer Incorrect Answer
    D 2 : 1 Correct Answer Incorrect Answer

    Solution

    Let the speed of the boat be x km/h And the speed of the stream be y km/h Distance travel in Upstream is = (x - y) × 8(4/5)   = (x - y) × 44/5 Distance travel in Downstream is= (x + y) × 4 Since the distance is the same – (x - y) x 44/5 = (x + y) x 4 11x - 11y = 5x + 5y   6x = 16y   x/y = 8/3 x: y=8:3

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