A cylindrical tank was 30.5 m in diameter and 13.1 m deep. The tank must be moved via an air-floating system. The top, bottom, and sides of the tank were made of 9.35 mm thick welded steel sheets. The density of the steel is 7.86g/cm^3
(A) What was the gauge pressure (in kPa) of the water at the bottom of the tank when it was completely full of water?
(B) What would the air pressure have to be (in kPa) beneath the empty tank in the order to just raise it up for movement?