A) \[7\frac{2}{7}\,cm\]
B) \[14\frac{2}{7}\,cm\]
C) \[28\frac{2}{7}\,cm\]
D) \[63\frac{9}{14}\,cm\]
Correct Answer: C
Solution :
Area of square \[~=81\text{ }c{{m}^{2}}\] \[Side\times Side=81\text{ }c{{m}^{2}}\Rightarrow Side=9\text{ }cm\] Now, diameter of circle = side of square\[=9\text{ }cm\]. \[\therefore \] Radius (r) of circle \[=\frac{9}{2}\,cm\] So, circumference of circle \[=2\pi r\] \[=\left( 2\times \frac{22}{7}\times \frac{9}{2} \right)cm=28\frac{2}{7}\,cm\]You need to login to perform this action.
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