A Man Has 155 Feet of Fencing to Enclose a Pasture

Multiple Choice

A man has 155 feet of fencing to enclose a pasture. Because a river runs along one side, fencing will be needed on only three sides. Find the width of the pasture if its length is parallel to the river and 5 feet less than twice the width.

A) 40 feet
B) $50 \frac { 1 } { 3 }$ feet
C) 51 feet
D) 41.5 feet