The length of the rectangle is 4 times its width, and the perimeter is 120 cm.

The length of the rectangle is 4 times its width, and the perimeter is 120 cm. The length and width of the rectangle are length and width.

We will solve this problem by writing an equation;

Let x cm – this is the value of the width of the rectangle given to us;

Then 4 * x cm is the value of the length of the rectangle given to us;

We also know that the value of the perimeter of the rectangle given to us is 120 cm, we compose an equation of the following form:

(x + 4 * x) * 2 = 120;

x + 4 * x = 120: 2;

x + 4 * x = 60;

5 * x = 60;

x = 60: 5;

x = 12.

12 cm – this is the value of the width of the rectangle given to us;

12 * 4 = 48 cm – this is the value of the length of the rectangle given to us.

Answer: 12 cm is the value of the width of the rectangle given to us; 48 cm – this is the value of the length of the rectangle given to us.