If the length of a rectangular field is increased by 25%, then by what percentage should its breadth be reduced so that the area of the field remains constant?
Show answer & explanation
Correct answer: D
Explanation
Given:
Length increased by 25%
Assume:
Length = 100
Width = 100
Area = 100 × 100 = 10,000
New Length = 125
New Width = 10,000 / 125 = 80
Decrease = 100 − 80 = 20
Percentage Decrease = (20/100) × 100 = 20%