Hello All...

This is my first posting so I am not sure if this is the right section.

I am having a hard time figuring out how to do this problem:

Question: Determine the mass of a tombstone made of the same material as the granite rock and having the dimensions of 260 cm by 90 by 40 cm. What is the mass of the tombstone?

..

I have not been given the mass of the granite rock yet, but once I do how would I set up this problem?