raffic signs are regulated by the manual on uniform traffic control devices. The perimeter of some traffic sign must be 72 inches. Also, its length is 12 inches longer than its width. Find the dimensions of this sign.

2(l+b)=72.

l+b=36 in.

l=12+b.

12+b+b=36.

2b=36-12.

2b=24.

b=24/2 =12in.

l=12+b=12+12=24in.

length l=24 in.

width b =12 in.