Question

What will be the percentage of increase in the area of a square when each of its sides is increased by 10%?

Answer 1

Answer:

21%

Step-by-step explanation:

Let the sides be 10 units

Area(A) = 10*10 = 100 Sq.units

10% increase on 10 units gives 11 units

New_Area(NA)  = 11*11 = 121 Sq.units

% increase = ((New_Area - Area)/ Area ) * 100 %

((121-100)/100) * 100 => 21 %

Answer 2

Answer:

21

Step-by-step explanation:

Let s be the side of the square.

Area of square = s².

Each side increased by 10%, hence new side of square = 1.1s.

Thus the area of square = 1 . s * 1.1s = 1.21 s².

Thus the percentage increase in area of square = 21 %