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    Question

    A boat covers 440 km downstream in 20 hours. If in still

    water it covers 196 km in 14 hours, then find the time required to travel 420 km upstream.
    A 35 hrs Correct Answer Incorrect Answer
    B 70 hrs Correct Answer Incorrect Answer
    C 56 hrs Correct Answer Incorrect Answer
    D 45 hrs Correct Answer Incorrect Answer

    Solution

    ATQ, Downstream speed = 440 / 20 = 22 km/hr Speed of boat in still water = 196 / 14 = 14 km/hr Speed of water = 8 km/hr Upstream time to cover 420 km: 420 / 6 = 70 hours

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