A rectangular planter's length is three times its width. Its area is $192$ square meters. Find the width and length.

$\text{Width}=8\text{ m}$

$\text{Length}=24\text{ m}$

$\text{Width}=-8\text{ m}$

$\text{Length}=-24\text{ m}$

No solution

$\text{Width}=16\text{ m}$

$\text{Length}=48\text{ m}$