A) \[4c{{m}^{2}}\]
B) \[6c{{m}^{2}}\]
C) \[16c{{m}^{2}}\]
D) \[36c{{m}^{2}}\]
Correct Answer: A
Solution :
\[m=\frac{I}{O}=\frac{f}{u-f}=\frac{10}{25-10}=\frac{10}{15}=\frac{2}{3}\] \[{{m}^{2}}=\frac{{{A}_{i}}}{{{A}_{o}}}\Rightarrow {{A}_{i}}={{m}^{2}}\times {{A}_{o}}\]\[={{\left( \frac{2}{3} \right)}^{2}}\times {{(3)}^{2}}=4\,c{{m}^{2}}\]You need to login to perform this action.
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