The perimeter of a rectangle is 0.36. Its length is 2 times its width. What is the area of the rectangle?

From the condition we know that the perimeter of the rectangle is 0.36. It is also known that its length is 2 times its width. In order to find what the area of the rectangle is equal to, we compose and solve a linear equation.

Let’s use the variable x to denote the width of the rectangle, then the length is 2x.

Perimeter of the rectangle: P = 2 (a + b);

2 (x + 2x) = 0.36;

6x = 0.36;

x = 0.6.

So 0.6 is the width of the rectangle and the length is 2 * 0.6 = 1.2.

We will search for the area of the rectangle by the formula:

S = a * b = 0.6 * 1.2 = 0.72.