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A) \[\frac{{{\pi }^{2}}}{14}c{{m}^{2}}\]
B) \[4{{\pi }^{2}}c{{m}^{2}}\]
C) \[16{{\pi }^{2}}c{{m}^{2}}\]
D) \[64\pi c{{m}^{2}}\]
Correct Answer: D
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