Assume that a deposit of oil is located 2000 m directly below. Estimate the size of the deposit, assumed spherical.

Answer 1

I feel it is difficult to answer this question because we need more information.

Answer 2

I posted an answer to a different but similar version of this question two days ago.

http://www.jiskha.com/display.cgi?id=1270523096

You do need more information. Are there measurements of the variation in the acceleration of gravity above the deposit?