Problema Solution
The length of a rectangular field is 20 less than its width. The area of the field is 12,000 ft2. What is the width of the field?
Answer provided by our tutors
let
l = the length of the field, l>0
w = the width of the field, w>0
The length of a rectangular field is 20 less than its width:
l = w - 20
The area of the field is 12,000 ft2:
l*w = 12000
plug l = w - 20 into the last equation
(w - 20)*w = 12000
by solving we find:
w = 120 ft
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the width of the field is 100 ft.