Solve the Problem $588 \mathrm{ft}^{2}$ , Find the Length and Width of the Garden

Multiple Choice

Solve the problem.
-A rectangular garden is three times as long as it is wide. If the area of the garden is $588 \mathrm{ft}^{2}$ , find the length and width of the garden.

A) length: $196 \mathrm{ft}$ ; width: $3 \mathrm{ft}$
B) length: $39 \mathrm{ft}$ ; width: $13 \mathrm{ft}$
C) length: $42 \mathrm{ft}$ ; width: $14 \mathrm{ft}$
D) length: $14 \mathrm{ft}$ ; width: $\frac{14}{3} \mathrm{ft}$