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    Question

    A boat can travel 26 km downstream in 30 min. The ratio

    of the speed of the boat in still water to the speed of the stream is 8: 5. How much time will the boat take to cover 22 km upstream?
    A 1(5/6) hr Correct Answer Incorrect Answer
    B 3(2/3) hr Correct Answer Incorrect Answer
    C 1(1/4) hr Correct Answer Incorrect Answer
    D 2(1/7) hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed of downstream = D/T = 26 × (60/30) = 52 km/hr The ratio of the speed of the boat in still water to the speed of the stream = 8: 5 (8x, 5x) => 13x = 52 => x = 4 Speed of upstream = 8x – 5x = 3x = 12 km/hr Distance = 22 km Time = D/S = 22/12 = 1(5/6) hr 

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