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

    Question

    A boat can cover 110 km in upstream in 11 hours and 140

    km in downstream in 7 hours. Find the speed of the stream.
    A 5 km/hr Correct Answer Incorrect Answer
    B 3 km/hr Correct Answer Incorrect Answer
    C 7 km/hr Correct Answer Incorrect Answer
    D 8 km/hr Correct Answer Incorrect Answer

    Solution

    Downstream speed = 140/7 = 20 km/hr Upstream speed = 110/11 = 10 km/hr Speed of stream = (20 – 10)/2 = 5 km/hr

    Practice Next