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    Question

    The speed of a boat in downstream

    and upstream is 30 km/hr and 22 km/hr, respectively. Find the approximate time taken by the boat to cover a distance of 160 km in still water.
    A 6 hours 24 minutes. Correct Answer Incorrect Answer
    B 12 hours 20 minutes Correct Answer Incorrect Answer
    C 19 hours 10 minutes Correct Answer Incorrect Answer
    D 15 hours 10 minutes Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Downstream speed = 30 km/hr,

    Upstream speed = 20 km/hr. Speed in still water = (30+20)/2 = 25 km/hr Time = Distance/speed = 160/25 = 6.4 hrs or 6 hours 24 minutes.

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