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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-11

  • question_answer
    A swimmer can swim 2 km. in 15 minutes in a lake and in a river he can swim a distance of 4 kms in 20 minutes along the stream. If a paper boat is put in the river, then the distance covered by it in \[2\frac{1}{2}\,hrs\] will be -

    A)  \[18\,km\]                   

    B)  \[12\,km\]

    C)  \[8\,km\]

    D)  10 km

    Correct Answer: D

    Solution :

     Speed of the man \[=\frac{2}{\frac{15}{60}}=8\,km/hr\] Speed downstream \[=\frac{4}{\frac{20}{60}}=12\,km/hr\] Speed of stream \[=4\text{ }km/hr\] Distance covered by paper boat in \[2\frac{1}{2}\] hours \[=\frac{5}{2}\times 4=\]


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