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SSC Sample Paper Mock Test-3 SSC CGL Tear-II Paper-1

  • question_answer
    A motor boat takes 2 h to travel a distance of 9 km down the current and it takes 6 h to travel the same distance against the current. The speed of the boat in still water and that of the current (in km/h), respectively are

    A)  3, 1.5

    B)  3, 2

    C)  3, 2.5              

    D)  3, 1

    Correct Answer: A

    Solution :

    Speed of boat in downstream\[=\frac{9}{2}=4.5\,\,km/h\]Speed of boat in upstream \[=\frac{9}{6}=1.5\,\,km/h\] \[\therefore \] Speed of boat in still water \[=\frac{1}{2}(4.5+1.5)=3\,\,km/h\] Speed of current \[=\frac{1}{2}(4.5-1.5)=\frac{3}{2}=1.5\,\,km/h\]                        


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