A) \[\pi {{r}^{2}}\]
B) \[2\pi {{r}^{4}}\]
C) \[\pi {{r}^{4}}\]
D) not possible
Correct Answer: C
Solution :
The area of the circle having radius\[R=\pi {{R}^{2}}\] According to the question,\[R={{r}^{2}}\] \[\therefore \] Required area\[=\pi {{({{r}^{2}})}^{2}}=\pi {{r}^{4}}.\]
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