Question

If the side of a square be increased by 50%, find the per cent increase in area​

Answer 1

Answer:

let side of square be a

so area will be a²

If side is increased by 50%

new side will be a + a/2 = 3a/2

Area = 9a²/4

Percentage change = 9a²/4 - a²/a² × 100

5a²/4 × 1/a² ×100 = 125 %

So 125% is your answer