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    Question

    The ratio of the boat's speed in still water to the speed

    of the stream is given as 16:4. The boat takes a total time in the ratio 10:7 to travel (d + 120) km upstream and (d - 60) km downstream. Determine the value of d.
    A 250 Correct Answer Incorrect Answer
    B 480 Correct Answer Incorrect Answer
    C 350 Correct Answer Incorrect Answer
    D 300 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ;


    Let speed of boat in still water and speed of stream be ‘16a’ km/h and ‘4a’ km/h respectively.

    Upstream speed = 16a – 4a = 12a km/h

    Downstream speed = 16a + 4a = 20a km/h

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