This Russian K-162 class submarine had a volume of about 12,095 m'. Assume 1/3 of the vessel's volume is above the water surface. How much seawater must the submarine take

on board to become neutrally buoyant (i.e., on the verge of sinking to allow cruising underwater)? Assume seawater p= 1,025 kg/m^3 and y 10,063 N/m^3.