Task 60 For regulating the water level in the pressure

Task 60 To regulate the water level in the pressure tank, a rotating flap is installed, which should open a square hole aha = 0.4 x 0.4 m in the vertical wall at a given level H (Fig. 1.24). Find the depth of immersion of the hinge O and the force of water pressure on the flap at a) H = 2m, b) H = 1.5m.