A) \[108\,\pi \,c{{m}^{3}}\]
B) \[\frac{112}{\pi }\,\,c{{m}^{3}}\]
C) \[112\,\pi \,c{{m}^{3}}\]
D) \[\frac{108}{\pi }\,\,c{{m}^{3}}\]
Correct Answer: B
Solution :
\[2\pi r=8\Rightarrow 4\pi r=4\] \[\Rightarrow \,\,r=\frac{4}{\pi }\] \[\therefore \] \[V=\frac{1}{3}\pi {{r}^{2}}h=\frac{1}{3}\times \frac{4\times 4}{\pi \times \pi }\times 21\] \[=\frac{112}{\pi }cu.\,cm.\]
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