Question

    The speed of current is 25 km/hr. If the speed of the

    boat in still water had been 12 km/hr more than the original speed then it would take 5.5 hours to cover 286 km in downstream. Find the original speed of the boat in still water (in km/h).
    A 10 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 15 Correct Answer Incorrect Answer
    D 14 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the speed of the boat in still water be ‘x’ km/hr According to the question, (x + 12 + 25) = 286/5.5 Or, x = 52 – 37 = 15

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