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SSC Sample Paper SSC-CGL TIER - I Sample Test Paper-9

  • question_answer
    If the area of a circular field is \[38.5\,{{m}^{2}}\], then the length of its boundary is \[\left( \pi =\frac{22}{7} \right)\]:

    A) 11 m                

    B) 22 m

    C) 22.5m.             

    D) None of the above

    Correct Answer: B

    Solution :

    Area of the circular field = 38.5 \[\pi \,{{r}^{2}}=38.5\] \[\frac{22}{7}{{r}^{2}}=38.5\,\,=\sqrt{\frac{38.5\times 7}{22}}=3.5\,m\] Length of its boundary \[2\,\pi \,r=2\times \frac{22}{7}\times 3.5=22m\]


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