The length of the rectangle is twice its width. If each of the sides is increased

The length of the rectangle is twice its width. If each of the sides is increased by 1 m, then its area will increase by 16 sq. M. Find the sides of the rectangle.

For the solution, we introduce the variable x.

Let’s assume that the width of the rectangle is x.

Since, by condition, the length of the rectangle is twice its width, the length is 2 * x = 2x cm.

The problem says that if each side is increased by 1 m, then its area will increase by 16 m2, then: 2x * x = x ^ 2 + 16, where x = 4 is the width, and the length is 2 * 4 = 8 cm …