The width of the rectangle is 4cm. What is its length if its perimeter is 22cm?

Before you start solving the problem, you should remember what the perimeter of a rectangle is. It is a sum of lengths on all sides: two widths and two lengths. From the problem statement, we know that the perimeter of the rectangle is 22 cm, and its width is 4 cm. Thus, we can find its length. To do this, perform the following action:

22 – (4 + 4) = 14 cm – the sum of the two lengths of the rectangle.

In order to find out the length of one side of it, you must:

14 ÷ 2 = 7 cm.

This means that the length of the rectangle is 7 cm.