How many percent will the square area increase if the side is increased by 30%.

To find the area of a square, you need to multiply the length of one side by the length of the second.

Let the side of the square be x cm.

Then its area will be:

x * x = x ^ 2.

If the length of the side of the square is increased by 30%, then it will be:

x + 0.3x = 1.3x.

Let’s calculate the area of the new square:

1.3x * 1.3x = 1.69x ^ 2.

Find out how much the area will increase:

1.69x ^ 2 – x ^ 2 = 0.69x ^ 2.

This means that the area will increase by 69%.

Answer: the area of the square will increase by 69%.