what are the dimensions of the soccer​ field?

Question

6000-yd squared plot of land. If the plan requires the length of the soccer field to be 40 yd longer than the width w

Answer 1

l = length
w = width
a = area

l * w = a
l = w + 40

(w + 40) * w = 6000
w^2 + 40w - 6000 = 0
(w - 60)(w + 100) = 0

w = 60
w = -100 Reject

width = 60 yds, length = 100 yds