Question

If each side of a square is increased by 10%, what is the percentage increase in the area?

Answer 1

Let say the side of the square is .
The area is then .
Increasing the side by 10% makes the side 
So the area is now,

21% increase 

Answer 2

increasing the each side of a square by 10%, then the new area of a square will be increase by 21% then the old area.



hope i helped you.