1. The problem statement, all variables and given/known data on a flat desk is an aquarium with a volume of 640 cm3 ,t's not full of water. The pressure to the bottom of the aquarium is 3 times bigger than to one side of it, how much water is in the tank? 2. Relevant equations is the pressure, is the normal force, is the area of the surface on contact. 3. The attempt at a solution I think this mainly requires crunching of crude formulas, I don't even know how to calculate the pressure to the side of a tank even if I have more variables. Thanks for even reading so far, any help is appreciated.