Hi I was reviewing for my final and I came across this problem: Problem: Basically there is a 6in long cylinder with dia = 24in Given weight density: 490 lb/ft^3 Each Hole is drilled symmetrically, each has 6in dia and equally space around a 10in dia circle concentric with the cylinder. This is the picture of the frontview of the cylinder: https://lh4.googleusercontent.com/-8m1r4npC7cg/T11OqGF6qhI/AAAAAAAAABY/4v2HCrEqhd4/s333/cyinder.png Approach So what I would do is: -First get that weight density into mass density by dividing it by 32.2 -Then find the mass of the cylinder without holes. -Find mass of each holes. -calculate the M of I of each hole about the center axis (parallel axis theorem) -calculate the M of I of the whole solid cylinder (no holes) -subtract the M of I of the holes from the whole cylinder Will I get the correct answer based on the technique above? Is there any mistake? Thanks for your time and consideration. Appreciate it!!!