SOLUTION: Gerry wants to fence a rectangular field whose area is 1200 sq.m. He has only 100 meters of fencing so he decided to fence only the three sides of the rectangle letting the wall be

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Question 893152: Gerry wants to fence a rectangular field whose area is 1200 sq.m. He has only 100 meters of fencing so he decided to fence only the three sides of the rectangle letting the wall be the fourth side. How wide should the rectangle be?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x and y dimensions.
Using 1*x and 2y for the fencing length, this length is x+2y.
highlight_green%28x%2B2y=100%29, and highlight_green%28xy=1200%29.

Either x or y could be considered length or width. Solve for both and decide which goes by the name you want. Two equations in two unknowns; so solving should be no trouble. Say if otherwise.

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

Gerry wants to fence a rectangular field whose area is 1200 sq.m. He has only 100 meters of fencing so he decided to fence only the three sides of the rectangle letting the wall be the fourth side. How wide should the rectangle be? 


Side parallel to wall can be 40 m, while other 2 sides can be 30 m each

OR

Side parallel to wall can be 60 m, while other 2 sides can be 20 m each