1. The problem statement, all variables and given/known data A hole of radius R/2 is cut from a solid sphere of radius R. If the mass of the remaining plate is M, then moment of inertia of the body about an axis through the centre is____. Answer:57/140*M*R^2 2. Relevant equations Moment of inertia of solid sphere is (2/5)*M*R^2 3. The attempt at a solution I was thinking that we could find the moment of inertia of the initial body, then subtract the MI of the removed part. However, the fact that the mass of removed part is not specified is hindering my progress. I do not know how else to approach the problem.