Three Solid,uniform Flywheels,each of Mass 65

Multiple Choice

Three solid,uniform flywheels,each of mass 65.0 kg and radius 1.47 m,rotate independently around a common axis.Two of the flywheels rotate in one direction at 3.83 rad/s;the other rotates in the opposite direction at 3.42 rad/s.Calculate the magnitude of the net angular momentum of the system.

A) 298 kg∙ m²/s
B) 778 kg∙ m²/s
C) 257 kg∙ m²/s
D) 222 kg∙ m²/s