A) 0.5%
B) 2%
C) 1%
D) 4%
Correct Answer: D
Solution :
\[A\propto {{L}^{2}}\] Þ \[\frac{\Delta A}{A}=2\cdot \frac{\Delta L}{L}\] Þ \[\frac{\Delta A}{A}=2\times 2=4%\].
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