Question

the side of a square is increased by 10% then the area of square will be increased by

Answer 1

let side of a square = 100 cm

area = side * side
= 100 * 100
= 10000 cm sq

now increase the side by 10 %

10/100 * 100
10

so the new side = 100 + 10
= 110
area = 110 * 110
= 12100
the area is increased by 2100
that is 21 %