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

    Question

    A boat covers 45 km downstream in 2 h and the same

    distance upstream in 10 h. Find the speed (in km/h) of the boat in still water.
    A 18 Correct Answer Incorrect Answer
    B 9 Correct Answer Incorrect Answer
    C 5 Correct Answer Incorrect Answer
    D 15 Correct Answer Incorrect Answer

    Solution

    Speed of boat downstream =45/2=22.5km/h Speed of boat upstream =45/10=4.5km/h Speed of the boat in still water = (22.5-4.5)/2 =18/2=9km/h

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