Section: Mathematics
18)
Susan wants to put up fencing around three sides of her rectangular yard and leave a side of 20 feet unfenced. If the yard has an area of 680 square feet, how many feet of fencing does she need?
Explanation
The area of the yard is 20w= 680 square feet, so w = 680/ 20 = 34 feet. The length of the fencing needed is 34+20+34=88 feet.
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