A) \[14\,m\]
B) \[220\,m\]
C) \[22\,m\]
D) \[104\,m\]
Correct Answer: A
Solution :
(a): \[A=\frac{\pi {{d}^{2}}}{4}=154\Rightarrow d=\sqrt{\frac{154\times 4}{\pi }}\] \[=\sqrt{\frac{154\times 4\times 7}{22}}=\sqrt{{{2}^{2}}\times {{7}^{2}}}=2\times 7=14\,cm\]
You need to login to perform this action.
You will be redirected in
3 sec
