A) \[86\,m\]
B) \[114\,m\]
C) \[130\,m\]
D) \[172\,m\]
Correct Answer: A
Solution :
| Outer perimeter of the lawn \[=2l\]Length of rectangle +Circumference of semi-circular ends |
| \[=2\times \left( l+\frac{1}{2}\times 2\pi {{r}^{2}} \right)\] |
| \[=2\times \left( 21+\frac{22}{7}\times 7 \right)=2\times 43=86m\] |
| So, option [a] is correct. |
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