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

    Question

    The speed of a boat in still water is 10 km/hr more than

    that of the current. The time taken by the boat to cover 575 km downstream is 11.5 hours. Find the total time taken by boat to travel 650 km downstream and 30 km upstream.
    A 12 hours Correct Answer Incorrect Answer
    B 16 hours Correct Answer Incorrect Answer
    C 10 hours Correct Answer Incorrect Answer
    D 11 hours Correct Answer Incorrect Answer

    Solution

    Therefore, downstream speed of the boat = 575/11.5 = 50 km/hr And, upstream speed of the boat = 10 km/hr Required time taken = (650/50) + (30/10) = 13 + 3 = 16 hours

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