The actual area of a rectangle is 60 Cm2, but while measuring its length a student decreases it by 20% and the breadth increases by 25%. The percentage error in area, calculated by the student is :
A. 5%
B. 15%
C. 20%
D. No change
Answer: Option D
Solution (By Examveda Team)
100 === 25% ↑===> 125 ===> 20% ↓===> 100 So there is no change in the area of rectangle Alternatively : Let area be 1 Area of rectangle, = l × b = 0.8 × 1.25 = 1This Question Belongs to Arithmetic Ability >> Percentage
Join The Discussion