Question 143841
LENGTH=2W+200
WIDTH=W
FORMULA FOR AREA IS:
AREA=L*W
40,000=(2W+200)W
40,000=2W^2+200W
2W^2+200W-40,000=0
2(W^2+100-20,000)=0
2(W-100)(W+200)=0
W-100=0
W=100 YDS. FOR THE WIDTH.
L=2*100+200
L=200+200
L=400
PROOF:
40,000=400*100
40,000=40,000