A tall tank filled with water has an irregular shape as shown. The wall CD makes an angle of 45^ with the horizontal; the wall AB is normal to the base BC . The lengths AB and CD are much smaller than the height h of water (figure not to scale). Let P ₁, P ₂ and P ₃ be the pressures exerted by the water on the wall AB , base BC and the wall CD respectively. Density of water is and g is acceleration due to gravity. Th