Question

The side of a square are increased by 10percent to make larger square.By what percent is the area increase

Answer 1

Answer:

Step-by-step explanation:

Let say the side of the square is s.

The area is then A%5B1%5D=s%5E2.

Increasing the side by 10% makes the side %281%2B10%2F100%29s=1.1s

So the area is now A%5B2%5D=%281.1s%29%5E2=1.21s%5E2

So then,

%28%28A%5B2%5D-A%5B1%5D%29%2FA%5B1%5D%29%2A100=%28%281.21s%5E2-s%5E2%29%2Fs%5E2%29%2A100=21

21% increase