question_answer

   If the length of a rectangle is increased by 25% the width is decreased by 20%, then the area of the rectangle 

A)                                 increases by 5%

B)  decreases by 5%   

C)                        remains unchanged

D)  increases by 10% 

Correct Answer: C

Solution :

\[\therefore \] According to question, Area of original rectangle\[=xy\] Area of new rectangle\[=1.25x\times 0.80y\] \[=xy\]