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    Question

    A boat goes 6km an hour in still water, it takes thrice

    as much time to go the same distance against the current in comparison to the direction of the current. The speed of the current is (km/h)
    A 7km/h Correct Answer Incorrect Answer
    B 4km/h Correct Answer Incorrect Answer
    C 3km/h Correct Answer Incorrect Answer
    D 9km/h Correct Answer Incorrect Answer

    Solution

    Let the speed of the boat in still water =B and speed of the stream =S B=6/1=6km/h B+S┬аB-S 1┬а ┬а ┬а ┬а3 (B+S) ├Ч1=(B-S) ├Ч3 B+S=3B-3S 2B=4S S= (2├Ч6)/4=3km/h

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