A) \[\text{344}\,\text{c}{{\text{m}}^{\text{2}}}\]
B) \[\text{364}\text{.5}\,\text{c}{{\text{m}}^{\text{2}}}\]
C) \[\text{346}\text{.5}\,\text{c}{{\text{m}}^{2}}\]
D) \[\text{366}\text{.5}\,\text{c}{{\text{m}}^{2}}\]
Correct Answer: C
Solution :
Diameter of circle \[=21\,cm\] \[\therefore \] Radius of circle \[=\frac{21}{2}\,cm\] Area of circle \[=\pi {{\left( \frac{21}{2} \right)}^{2}}=\frac{22}{7}\times \frac{21}{2}\times \frac{21}{2}\] \[=346.5\,c{{m}^{2}}\]
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