What is the percentage increase in the area of a rectangle if each of its sides is increased by 20%?

Let original length = 10
original breadth = 10
Then, original area
= 10 × 10
= 100
Length is increased by 20%
⇒ New length = 10 + 2 (2 is 20% of 10)
= 12
Breadth is increased by 20%
⇒ New breadth = 10 + 2 (2 is 20% of 10)
= 12
New area = 12 × 12
= 144
Increase in are =
= new area - original area
= 144 - 100
= 44
Percentage increase in area
= (increase in area/original area) × 100
= {(44/100) × 100}%
= 44%