Question 1005041
Call the lot's width, w.  Then its length is w + 50.
Perimeter = 2L + 2W = 2(w + 50) + 2w = 5(4(24)) + 20
Then we get
2w + 100 + 2w = 5(96) + 20
4w + 100 = 480 + 20 = 500
4w = 400
w = 100 feet
The length is 50 feet more, or
150 feet.