The length of a rectangle is 10 cm more than its width. If the perimeter is 40 cm, what is the width?
Note
Let the width be w. Then length is w + 10. Perimeter is 2(length + width), so 2((w + 10) + w) = 40. This gives 4w + 20 = 40, so w = 5 cm.
The length of a rectangle is 10 cm more than its width. If the perimeter is 40 cm, what is the width?
Let the width be w. Then length is w + 10. Perimeter is 2(length + width), so 2((w + 10) + w) = 40. This gives 4w + 20 = 40, so w = 5 cm.