A) 400%
B) 150%
C) 200%
D) 300%
Correct Answer: D
Solution :
[d] \[A=\ell b\] \[A'=(2\ell )\,\,(2b)=4\ell b=4A\] \[%\,Change=\frac{4A-\,A}{A}\times 100=300%\]
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