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    Question

    A boat covers a distance of 108 km downstream in 3

    hours. If the ratio of upstream speed to downstream speed of the boat is 5:9, then find the distance travelled by the boat in upstream in 8 hours.
    A 120 km Correct Answer Incorrect Answer
    B 160 km Correct Answer Incorrect Answer
    C 125 km Correct Answer Incorrect Answer
    D 130 km Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the upstream and downstream speed of the boat be '5x' km/hr and '9x' km/hr, respectively. ATQ, 9x = (108/3) So, 'x' = 4 So, upstream speed of the boat = 5x = 5 × 4 = 20 km/hr Required distance = 20 × 8 = 160 km

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