1.2. If the length of the tank in the Figure below is 1.45 m, calculate the total force on the bottom of the tank. NB: The tank is open on top. 1 3 m Tank is 1.45 m long Oil 1.25 m (sg = 0.80) Water 2.5 m 2.0 m Question 1 (5 Marks) Calculate the total force (kN) on the bottom of the closed tank shown in the Figure below if the air pressure is 62 000 Pa(gage). 1.1. Air 0.45 m Oil (sg = 0.85) 0.80 m Water 1.5 m -1.1 m