A tailor trims 6 feet from opposite edges of a square piece of cloth, and 5 feet from the other two edges. If 80 square feet of cloth remain, what was the length of a side of the original piece of cloth?  Choose one.
A) 16
B) 18
C) 20
D) 24
E) 32
Let the original side of the square be x.   (x-12)*(x-10) = 80 = 8*10   x = 20   The answer is 20.
<result>C</result>
A tailor trims 6 feet from opposite edges of a square piece of cloth, and 5 feet from the other two edges. If 80 square feet of cloth remain, what was the length of a side of the original piece of cloth?