If the length of a rectangle is increased by 12% and the breadth is decreased by 8%, the net effect on the area is:

A. increase by 3.04%

B. increase by 2.6%

C. decrease by 3.04%

D. decrease by 2.6%

Answer: Option A

Solution(By Examveda Team)

$$\eqalign{ & 12\% \to \frac{{ + 3}}{{25}} \cr & 8\% \to \frac{{ - 2}}{{25}} \cr & {\text{Length}} \to 25:28 \cr & \underline {{\text{Breadth}} \to 25:23} \cr} $$

$${\text{Increase }}\% = \frac{{19}}{{625}} \times 100 = 3.04\% $$