Answer
$12 \text{ feet}$
Work Step by Step
$\because s = r \theta$
where
$s$: Length of the arc of the circle
$r$: Radius of the circle
$\theta$: Central angle that subtends the arc (in radians)
Use the $formula above to obtain:
s= r \theta$
$s = 6 \times 2 = \boxed{12 \text{ feet}}$