A) \[60\,\pi \]
B) \[\frac{15}{\pi }\]
C) \[\frac{30}{{{\pi }^{2}}}\]
D) \[30\]
Correct Answer: C
Solution :
\[2\pi r=\frac{30}{\pi },\,2r=\frac{30}{{{\pi }^{2}}}.\]
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