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

    Question

    The speed of a boat in still water is 26 km/hr. If the

    boat covers 75 km in upstream in 5 hours, then find the time taken by the boat to travel 111 km in downstream.
    A 2 hours Correct Answer Incorrect Answer
    B 2.5 hours Correct Answer Incorrect Answer
    C 3 hours Correct Answer Incorrect Answer
    D 3.5 hours Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the speed of the boat in still water and the speed of the current be ‘x’ km/hr and ‘y’ km/hr, respectively Upstream speed of the boat = (x – y) = 75/5 = 15 km/hr Or, 26 – y = 15 Or, y = 26 – 15 = 11 km/hr Therefore, downstream speed of the boat = 26 + 11 = 37 km/hr Required time taken = 111/37 = 3 hours

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