Question

The length of a rectangular plot is increased by 25%. To keep its area unchanged, the width of the plot should be

• A. Kept unchanged
• B. Increased by 25%
• C. Increased by 20%
• D. Reduced by 20%

Answer 1

Answer: (D)

Reduced by 20%

Answer 2

Let length of rectangular plot be 4 m and width be 10 m
Area = lb = 40m2
After length is increased by 25%, new length = 5m
New width if area is same =$\frac{40}{5}=8$ m
Therefore, Reduction in width =$\frac{(10-8)}{10}\times100$
The correct answer is (D): Reduced by 20%