SOLUTION: A rectangular yard has an area of 2160 square feet. The length of the yard is three feet longer than its width. What is the perimeter of the yard?

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Question 740832:
A rectangular yard has an area of 2160 square feet. The length of the yard is three feet longer than its width. What is the perimeter of the yard?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
AREA=L*W
L=W+3
2,160=(W+3)W
2,160=W^2+3W
W^2+3W-2,160=0
(W+48)(W-45)=0
W-45=0
W=45 ANS. FOR THWE WIDTH.
L=45+3=48 ANS. FOR THE LENGTH.
PROOF:
2,160=45*48
2,160=2,160
P=2L+2W
P=2*48+2*45
P=96+90
P=186 ANS. FOR THE PERIMETER.