Question

The actual area of a rectangle is $60c{m}^2$. But, while measuring its length a student decreases it by 20% and the breadth increases by 25%. The percentage error in the area, calculated by the student is :

• A. 5%
• B. 25%
• C. Can't be determined
• D. None of these

Answer 1

The correct option is D None of these

$Area=l\times b1=1\times 11=0.8\times 1.25$
So the area remained constant.