The area of a rectangular field is equal to 500 square meters. Its perimeter is equal to 90 meters. Find the width of this rectangle.	Select.
A) 5	B) 10	C) 15	D) 20	E) 25
L * W = 500 : area , L is the length and W is the width.   2 L + 2 W = 90 : perimeter   L = 45 - w : solve for L   (45 - W) * W = 500 : substitute in the area equation   W = 20 and L = 25   correct answer 20
<result>D</result>
The area of a rectangular field is equal to 500 square meters. Its perimeter is equal to 90 meters. Find the width of this rectangle.