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SSC Sample Paper SSC CGL - Sample Paper-17

  • question_answer
    In a fixed time, a boy swims double the distance along the current that he swims against the current. If the speed of the I current is 3 km/h, the speed of the boy in still water is

    A) 6 km/h             

    B) 9 km/h

    C) 10 km/h            

    D) 12 km/h

    Correct Answer: B

    Solution :

    Let the rate of swimming in still water be x km/h. \[\therefore \]      Rate downstream \[=(x+3)\text{km/h}\] \[\therefore \]      Rate upstream \[=(x-3)\text{km/h}\] According to the question,             \[(x+3)t=2(x-3)\times t\] \[\Rightarrow \]   \[x+3=2x-6\] \[\Rightarrow \]   \[x=9\,\text{km/h}\]


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