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    Question

    The speed of the stream is 15 km/h. Boat ‘A’ covers

    100 km distance against the stream in 4 hours and boat ‘B’ covers 90 km distance against the stream in 3 hours. The speed of boat ‘B’ in still water is how much percent of the speed of boat ‘A’ in still water?
    A 102.5% Correct Answer Incorrect Answer
    B 132.5% Correct Answer Incorrect Answer
    C 122.5% Correct Answer Incorrect Answer
    D 112.5% Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Speed of boat ‘A’ upstream = 100/4 = 25 km/h Speed of boat ‘B’ upstream = 90/3 = 30 km/h Speed of the boat ‘A’ in still water = 25 + 15 = 40 km/h Speed of the boat ‘B’ in still water = 30 + 15 = 45 km/h Required percentage = (45/40) × 100 = 112.5%

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