We're only gettin' older, baby And I've been thinkin' about it lately
Does it ever drive you crazy
Just how fast the night changes?
Everything that you've ever dreamed of
Disappearing when you wake up
But there's nothing to be afraid of
Even when the night changes
It will never change me and you

the tempo markings are fast-slow-fast..

perimeter = 2l +2w, divide total perimeter by 2 for total length of 1 side and 1 width

172/2 = 86 (  total for 1 side and 1 width)

86-24 = 62 (since length is 24 ft longer subtract 24 then divide by 2 for width)

62/2 = 31

width = 31 feet

length = 31 +24 = 55 feet

check: 31*2 = 62, 55*2 = 110,  110+62 = 172