Time period of a pendulum consisting of a rod and bob

[justwild]

Homework Statement

How should I find the time period of a pendulum which is made up of a rod of length l fitted with a bob of radius r at its one end and the other end being pivoted to the wall?



2. The attempt at a solution
Actually having problem with calculating the moment of inertia of the system, which I think is the very step to solution of the problem.

 

[haruspex]

Actually having problem with calculating the moment of inertia of the system, which I think is the very step to solution of the problem.

You'll need both the moment of inertia and the centre of mass. What equations do you have for moment of inertia that might be relevant?