1. The problem statement, all variables and given/known data A sphere of mass M and Radius R had two spheres of R/4 removed. the centres of cavities are R/4 and 3R/4 from the centre of the original sphere (at x=0). what is the x coordinate of the centre of mass of this object? there is a drawing next to the question literally showing the cavities on the right side of the circle nothing else so i did not include it with the question. 2. Relevant equations none, but the answer given is -1/62 x R 3. The attempt at a solution I have absolutely no idea where to start with this problem. I used the Xcm equation but it didnt work and I have done a similar problem but that one had mass and radius given so now this confuses me. any help or procedure would be helpful (this is a practice final [final is in 2 days]).