ีuse the parallel axis theorem to find moment of inertia of a solid circular cylinder about a line on the surface of the cylinder and parallel to the axis of the cylinder.
Suppose the cross section of the cylinder is represented as in Fig.9-18. then the axis is represented by C, while the line on the surface of the cylinder is representedby A.
It a is the radius of the cylinder, then by Problem 9.4 and the parallel axis theorem we have