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Hashem wants to put up fencing around three sides of his 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 he need?

Hashem wants to put up fencing around three sides of his 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 he need? Correct Answer 88

Since the yard is a rectangle and one side is 20, which we can call the length, then the width (w) is: 680 = 20w or, w = 34 Thus, he needs 34 + 34 + 20 = 88 feet of fencing. ans: 88 feet

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