The disk, which has a mass of $20kg,$ is subjected to the couple moment of $M=30Nm.$ If it starts from rest, determine its angular velocity when it has rotate three revolutions clockwise.

a$.47\mathrm{.}25ra\frac{d}{s}$

b$.$ none of the mentioned

c$.20\mathrm{.}65ra\frac{d}{s}$

d$.35\mathrm{.}45ra\frac{d}{s}$