Answer:
Length=18 Width=6
Step-by-step explanation:
Hello, You should first you algebra and and assign the dimensions with letters.
Length=x Width= 1/3x
as its the perimeter you add all the side together
x + x + 1/3x + 1/3x
which equals= 8/3x (this is an improper fraction at the moment)
then we know the total perimeter =48
so 48=8/3 x
so rearrange to get X by it's self
so 48 x 3/8
which x=18
