Problem: A rectangular field is half as wide as it is long and is completely enclosed by x yards of fencing. The area in terms of x is:
Answer Choices:
A. 2x2
B. 2x2
C. 92x2
D. 18x2
E. 72x2
Solution:
Let the dimensions of the field be w and 2w. Then 6w=x,w=x/6, and 2w=x/3.∴A=w⋅2w=x2/18.