1. The problem statement, all variables and given/known data Show that a spherical body with density p (r) =Pc(1−x) where x = r/R and R its radius, has a central density pc that is 4 times larger than the mean density (< p > =mass/volume). 2. Relevant equations not sure 3. The attempt at a solution im not sure how to start this problem... can someone give me a hit on doing this question. please!