A Rectangular Garden of Area 50 Square Feet Is to Be

Multiple Choice

A rectangular garden of area 50 square feet is to be surrounded on three sides by a fence costing $2 per running foot and on one side by a brick wall costing $6 per running foot. Let x be the length of the brick wall side. Which of the following represents the total cost of the material?

A) 3x + (50 - x)
B) 6x + $\frac { 50 } { x }$
C) 6x + $\frac { 300 } { x }$
D) $\frac { 3 x } { 50 }+ \frac { 1 } { 50 x }$
E) none of these