Answer:
-5,3,4
Step-by-step explanation:
see the attachment below
width = w
length = 2w
perimeter = 2w + 2 l
perimeter = 2w +2(2w)
60 = 2w + 4w
60= 6w
60=6w
w = 60/6 = 10
length = 10x2 = 20
10+10+20+20 = 60
