The perimeter of a rectangle is 72 cm. The length, l, of the rectangle is 6 cm longer than the width, w.

What is the width of the rectangle?

A. 10 cm

B. 8 cm

C. 15 cm

D. 33 cm

Let l be the length and w be the width of the rectangle.

It is given that the perimeter is 72 cm.

Therefore, 2 (l + w) = 72

Divide both sides by 2.

l + w = 36

It is also given that the length l is 6 cm longer than the width, w.

Therefore, l = w + 6

Now, (w + 6) + w = 36

(w + w) + 6 = 36

2w + 6 = 36

2w = 36 - 6

2w = 30

Divide both sides by 2.

w = 15

Hence, the width of the rectangle is 15 cm. and it is given in option C.