The perimeter of a rectangle is 72 cm what is the length and width of the rectangle if the length is 3 times its width.

From the condition it is known that the perimeter of the rectangle is 72 cm. We need to find the length and width of the rectangle of the rectangle if the length is 3 times greater than its width.

To do this, we will compose and solve equations.

Let’s denote the width of the rectangle using the variable x cm, then the length can be written as 3x cm.

Let’s remember the formula for finding the perimeter and write the equation:

P = 2 (a + b);

2 (x + 3x) = 72;

4x = 72: 2;

4x = 36;

x = 36: 4;

x = 9 cm width of the rectangle, then 3 * 9 = 27 cm length of the rectangle.