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    Question

    If the speed of a boat in still water is 20 km per hour

    and the speed of current is 5 km per hour then the time taken by the boat to travel 150 KM with the current is
    A 6h Correct Answer Incorrect Answer
    B 4h Correct Answer Incorrect Answer
    C 8h Correct Answer Incorrect Answer
    D 12h Correct Answer Incorrect Answer

    Solution

    Let the speed of boat in still water =B and speed of stream =S B=20km/h, S= 5km/h Speed of boat in downstream =(B+S) =25km/h Time = Distance /Speed =150/25 =6hours

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