Solve the Problem $\frac { 5 \pi } { 6 }$

Multiple Choice

Solve the problem.
-On a circle of radius 18 meters, how long is an arc that subtends a central angle of $\frac { 5 \pi } { 6 }$ radians?

A) $3 \pi \mathrm { m }$
B) $90 \mathrm {~m}$
C) $15 \pi \mathrm { m }$
D) $15 \mathrm {~m}$