Answer:
length =20m
width=16m
Step-by-step explanation:
let the length of the rectangle be x
then the width =x-4
perimeter =72
perimeter formula =2(l+b)
so,
2(x+x-4)=72
2x+ 2x-8=72. (using distributive property)
4x-8=72
4x=72+8
= 80
x= 80/4
x=20
therefore, length is 20
width=x-4
=20-4
=16
