The area of the rectangle is 120 cm2. Its length is 7cm longer than its width. Find the perimeter of the rectangle.

1) Let us find out how long this rectangle has, if it is known that its area is 120 cm², and the width is 7 cm less than the length. We draw up an equation where:

X is the length;

7X – width;

120 – area.

X + 7X = 120;

8X = 120;

X = 120/8

X = 15 cm.

2) Let’s find out what width this rectangle has, if it is known that it is 7 cm less than its length.

15 – 7 = 8 cm.

3) Find out what perimeter this rectangle has.

(15 + 8) * 2 = 46 cm.

Answer: the perimeter of this rectangle is 46 cm.