1. The problem statement, all variables and given/known data Fossilized ichthyosaurus remains enable us to estimate their volume. If we assume that a 3m^3 icthyosaurus was "wightless" when it swam under water. What was its weight in metric tonnes? 2. Relevant equations B=Wdisp. lqd ?? 3. The attempt at a solution B=V x density x g g=9.81 density= 1000 kg/m^3 (assuming fresh water) V=3m^3 plugging this into the equation would give me B .. not weight??