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SSC Sample Paper SSC CGL - Sample Paper-12

  • question_answer
    A copper wire is bent in the form of square with an area of \[121\,c{{m}^{2}}.\] If the same wire is bent in the form of a circle, the radius (in cm) of the circle is \[(Take\,\,\pi =\frac{22}{7})\]

    A) 7                     

    B) 10

    C) 11                                

    D) 14

    Correct Answer: A

    Solution :

    Side of square \[=\sqrt{121}=11\,cm\] \[\therefore \] Length of wire \[=4\times 11=44\,cm\] \[\therefore \]      \[2\pi r=44\] \[\Rightarrow \]   \[2\times \frac{22}{7}\times r=44\] \[\Rightarrow \]   \[r=\frac{44\times 7}{2\times 22}=7\,cm\]


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