Prob. 2.29 A piston having a cross-sectional area of 3 sq in and negligible weight is located in a cylinder containing oil (SG = 0.9) as shown in Fig. P2.29. The cylinder is connected to a pressurized tank containing water and oil. A force, P, holds the piston in place. Cylinder Air pressure = 5 psi 2 ft Oil (SG = 0.9) 2 ft 3 ft Water Piston 3 ft 4-in.diamter Tank bottom FIGURE P2.29 b. Determine the required value of the force, P. Determine the pressure head, expressed in feet of water, acting on the tank bottom