An unknown liquid fills a square container of sides 10 meter. Find what is the density of a material if the pressure 5 meter below the surface is 1.3 atm? Assume g=10 m/s2 and the pressure at the surface of the liquid is 1 atm. Also suppose that 1 atm = 105 Pa. (Hint: make sure to use the reference surface pressure in solving the problem as we are not giving you the extra pressure, it is the total (liquid pressure + atmospheric) pressure that is given.
Answer in kg/m3