The length of a rectangle is 9 cm more than its width. If the perimeter is 66 cm, what is the width?
Note
Let the width be w. Then length is w + 9. Perimeter is 2(length + width), so 2((w + 9) + w) = 66. This gives 4w + 18 = 66, so w = 12 cm.
The length of a rectangle is 9 cm more than its width. If the perimeter is 66 cm, what is the width?
Let the width be w. Then length is w + 9. Perimeter is 2(length + width), so 2((w + 9) + w) = 66. This gives 4w + 18 = 66, so w = 12 cm.