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    Question

    A boat can travel 30 km upstream and 45 km downstream in

    6 hours. Find the speed of the boat in still water if the speed of the stream is 4 km/h.
    A 12 km/h Correct Answer Incorrect Answer
    B 14 km/hr Correct Answer Incorrect Answer
    C 18 km/hr Correct Answer Incorrect Answer
    D 15 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 ‘x’ km/h. Upstream speed = ‘x – 4’ km/h Downstream speed = ‘x + 4’ km/h According to the question: Thus, the speed of the boat in still water is  12 km/h .

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