New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    The ratio of the boat's speed in still water to the speed

    of the stream is given as 10:2. The boat takes a total time in the ratio 15:11 to travel (d + 70) km upstream and (d - 30) km downstream. Determine the value of d.
    A 25 Correct Answer Incorrect Answer
    B 84 Correct Answer Incorrect Answer
    C 35 Correct Answer Incorrect Answer
    D 15 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ;
    Let speed of boat in still water and speed of stream be ‘10a’ km/h and ‘2a’ km/h respectively.

    Upstream speed = 10a – 2a = 8a km/h

    Downstream speed = 10a + 2a = 12a km/h
    Image
    Or d = 35

    Practice Next

    Relevant for Exams: