Question

The length of a rectangle is increased by 10% and its width is reduced by 20%. Express the area of ​​the new rectangle as a percentage of the area of ​​the initial rectangle

Answer 1

A= (l+0.1l)*(b-0.2b)

Explanation:

let the length and width be l and b

length= l +(10/100*l) = l+0.1l

width= b-(20/100*b)= b-0.2b

thus the area would be

A= (l+0.1l)*(b-0.2b)