IT IS FROM PRACTICE BOOK OF OLYMPIAD.MY TEACHERS TOLD BUT IT WAS SOME 4 INCH TWO EQUATION AND TOLD ME TO SOLVE.
closed as off-topic by Hritik Narayan, John Rennie, Steeven, David Hammen, Kyle Kanos May 27 '17 at 11:13
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Homework-like questions should ask about a specific physics concept and show some effort to work through the problem. We want our questions to be useful to the broader community, and to future users. See our meta site for more guidance on how to edit your question to make it better" – Hritik Narayan, John Rennie, Steeven, David Hammen, Kyle Kanos
Forget about the asteroid with an empty cavity. What we have here is two spherical asteroids, one inside the other, and the smaller one with negative mass.