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    Question

    The speed of current is 18 km/hr. If the speed of the

    boat in still water had been 7 km/hr more than the original speed, then it would take 8 hours to cover 440 km in downstream. Find the original speed of the boat in still water (in km/hr).
    A 17 km/hr Correct Answer Incorrect Answer
    B 27 km/hr Correct Answer Incorrect Answer
    C 30 km/hr Correct Answer Incorrect Answer
    D 22 km/hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the speed of the boat in still water be тАШxтАЩ km/hr. According to the question, (x + 7 + 18) = 440 / 8 Or, x + 25 = 55 So, x = 55 - 25 = 30 km/hr Final Answer: 30 km/hr

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