A) 50% increase
B) 50% decrease
C) 25% increase
D) 75% decrease
Correct Answer: A
Solution :
Let a and b be the length and breadth of rectangle. \[\therefore \] Area of rectangle \[{{A}_{1}}=a\times b\] New length \[=\frac{a}{2}\] and new breadth \[=3b\] \[\therefore \] Area of rectangle, \[{{A}_{2}}=\frac{3}{2}ab\] Change\[=\frac{1}{2}ab\] % change \[=\frac{\frac{1}{2}ab}{ab}\times 100%=50%\]
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