Q. If the length of a rectangle is reduced by 20%, then by what percent should its width be increased so that the area does not increase?
A) 15%
B) 25%
C) 35%
D) 38%
✔ Correct Answer: 25%
Exam Insight
Let the original dimensions be length = L and width = W. New length = 0.8L. To maintain the same area, (0.8L) × (new width) = L × W. New width = W / 0.8 = 1.25W. Hence, the width must be increased by 25%.