Real easy

[elemnt55]

A high-speed sander has a disk 4.00 cm in radius that rotates about its axis at a constant rate of 1100 revolutions per minute. Determine the angular speed of the disk in radians per second.

I get angular displacement / Time = 360rad/.0545454s

180=pi*rad <= need help figuring out radians of problem

[Gamma]

one revolution = 2 * \pi radians