A) \[38.5\,{{m}^{2}}\]
B) \[40.5\,{{m}^{2}}\]
C) \[41.5\,{{m}^{2}}\]
D) None of these
Correct Answer: A
Solution :
| [a] Area of top of the pit |
| \[=\pi {{\left( \frac{7}{2} \right)}^{2}}=\frac{22}{7}\times \frac{7}{2}\times \frac{7}{2}=\frac{77}{2}=38.5{{m}^{2}}\] |
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