The perimeter of a rectangular yard is completely surrounded by a fence that measures 12 meters. What is the length of the yard if the area of the yard is 9 meters squared?
Choose the correct option:
A) 8 B) 1 C) 3 D) 4 E) 6
Perimeter of rectangular yard = 2(l + b) = 12 --&gt; l + b = 6   Area = l * b = 9   b = 6 - l   l(6 - l) = 9   6l - l^2 = 9   l^2 - 6l + 9 = 0   Upon simplifying we get l = 3.   Answer: 1
<result>B</result>
The perimeter of a rectangular yard is completely surrounded by a fence that measures 12 meters. What is the length of the yard if the area of the yard is 9 meters squared?