[Question] A large tank contains oil having a density of 917 kg/m³. The tank is 3.66 m tall and is vented to the atmosphere of 1 atm at the top. The tank is filled with oil to a depth of 3.05 m and also contains 0.61 m of water in the bottom of the tank. Calculate the pressure (Ptop) in Pa 3.05 m from the top of the tank and the pressure(Pbottom) at the bottom. [Question] A concrete dam of width 150 m has the cross-sectional profile shown in Figure 1. Calculate the magnitude, direction and position of action of the resultant force exerted by the water on the dam. Answers: (a) F = (b) Fhorizontal= (c) Fvertical = = N N N 10m Figure 1 75°