146k views
2 votes
The area of a rectangular wall of a barn is 160 square feet. It's length is 4 feet longer than twice it's width. Find the length and width of the wall of the barn

1 Answer

5 votes
Formula:
L = 2W + 4

Width:
W(2W + 4) = 160
2W^2+4W = 160
2W^2 + 4W - 160 = 0
2(W^2 + 2W - 80) = 0
2(W + 8)(W - 10) = 0

Width:
W - 10 = 0
W = 10

Width is 10 ft.

Length:
L = 2(8) + 4
L = 16 + 4
L = 20

Length is 20 ft.
User Brabster
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories