New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    A boat takes 4 hours to travel 48 km downstream and 6

    hours to travel 24 km upstream. What is the speed of the boat in still water?
    A 10 km/h Correct Answer Incorrect Answer
    B 8 km/h Correct Answer Incorrect Answer
    C 9 km/h Correct Answer Incorrect Answer
    D 7 km/h Correct Answer Incorrect Answer

    Solution

    Downstream speed = 48/4 = 12 km/h. Upstream speed = 24/6 = 4 km/h. Speed in still water = (12 + 4)/2 = 8 km/h. Correct option: b

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