A Farmer Has Feet of Fence with Which to Make

Multiple Choice

A farmer has feet of fence with which to make a corral. If he arranges it into a rectangle that is twice as long as it is wide, what are the dimensions?

A) 21 feet width and 42 feet long
B) 36 feet width and 72 feet long
C) 18 feet width and 36 feet long
D) 28 feet width and 56 feet long
E) 54 feet width and 108 feet long