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

    Question

    A boat goes 52 km in Downstream in 4 hours and takes 5

    hours to complete a distance of 15 km in upstream. Find the speed of boat in still water.
    A 6.2 km/hr Correct Answer Incorrect Answer
    B 7 km/hr Correct Answer Incorrect Answer
    C 12 km/hr Correct Answer Incorrect Answer
    D 8 km/hr Correct Answer Incorrect Answer

    Solution

    Speed of boat in still water = (D + U)/2 Downstream speed (D) = 52/4 = 13 km/hr Upstteam speed (U) = 15/5 = 3 km/hr Speed of boat in still water = (13 + 3)/2 = 16/2 = 8 km/hr

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