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SSC Sample Paper SSC CGL - Sample Paper-7

  • question_answer
    The area of circle is 38.5 sq cm. Its circumference (in cm) is \[\left( use\,\,\pi =\frac{22}{7} \right)\]

    A)  22                   

    B)  24

    C)  26                               

    D)  32

    Correct Answer: A

    Solution :

    Let r be the radius of circle. \[\therefore \]      \[\pi {{r}^{2}}=38.5\] \[\Rightarrow \]   \[{{r}^{2}}=\frac{38.5\times 7}{22}=12.25\] \[\Rightarrow \]   \[r=3.5\,cm\] \[\therefore \] Circumference of circle \[=2\pi r\]             \[=2\times \frac{22}{7}\times 3.5\]             \[=22\,cm\]       


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