Why Does a Cylinder Have the Least Moment of Inertia Compared to a Ring?

[VooDoo]

Could somebody please explain why the cylinder has the least moment of intertia about the axis? And which one has the greatest, the ring?

 

[Cyrus]

You have to do the integral to find that out, or look up their values online. Do you know what MOI means?

 

[FredGarvin]

Big hint: The moment of inertia is the description of how mass is distributed about an axis.