Question

A 2 inch by 2 inch square has its area increased by 21 square inches producing a new square. How many inches long is a side of the new square?

Answer 1

A 2 by 2 inch square has an area of 4 square inches.

If its area is increased by 21 inches, then its area equals 25 square inches.

To find the length of the side we take the square root of 25 square inches which is 5 inches.

Explanation: