From a complete ring of mass M and radius R, an arc of making `30^(@)` at centre is removed. What is the moment of inertia of the incomplete ring about an axis passing through the centre of the ring and `bot^(er)` to the plane of the ring

Explanation

mass of in complete ring = `M-(M)/(2pi)xx (pi)/(16)=(11M/(12))`
MOI of inertia of incomplete ring `I=[(11m)/(12)]R^(2)`