The Angular Speed of the Hour Hand of a Clock,in $\frac { 1 } { 1800 } \pi$

Multiple Choice

The angular speed of the hour hand of a clock,in rad/min,is

A) $\frac { 1 } { 1800 } \pi$ .
B) $\frac { 1 } { 60 } \pi$ .
C) $\frac { 1 } { 30 } \pi$ .
D) $\pi$ .
E) 120 $\pi$ .