Originally Posted by
ebaines
Think about it - if the sub neither rises nor falls what does that mean about its overall density compared to the density of water? A rock sinks because it's denser than water, and a piece of wood floats because it's less dense than water, right?
Once you know the density of the submarine, given its mass you can calculate its volume.
You can calculate the mass of the water + submarine in the pool from the dimensions you were given as long as you know how the density of the sub compares to the density of the water.