A) \[\text{2r}\,\text{c}{{\text{m}}^{\text{2}}}\]
B) \[{{\text{r}}^{\text{2}}}\text{ c}{{\text{m}}^{\text{2}}}\]
C) \[\text{2}{{\text{r}}^{\text{2}}}\text{ c}{{\text{m}}^{\text{2}}}\]
D) \[\frac{r}{2}\text{c}{{\text{m}}^{\text{2}}}\]
Correct Answer: B
Solution :
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