1. The problem statement, all variables and given/known data A spherical body of radius R consists of a fluid of constant density and is in equilibrium under its own gravity. If P(r) is the pressure at r (r<R) then the correct option(s) is(are): (more than one correct) (A) P(r = 0) = 0 (B) [P(r=3R/4)] / P(r=2R/3) = 63 / 80 (C) [P(r=3R/5)] / P(r=2R/5) = 16 / 21 (D) [P(r=R/2)] / P(r=R/3) = 20 / 27 2. Relevant equations 3. The attempt at a solution I believe this is a question from gravitational pressure, but I don't really understand how to solve problems on this concept. I know that you have to take an element of thickness dr at a distance r from the centre. And do something with that. But I don't understand anything about this concept. Please help?