Here are the steps to solve this problem using Pascal's law: 1) Wall AB and CD are both vertical surfaces with an area of 2.44 m x 5 m = 12.2 m^2 Pressure at the bottom is due to a water column of 5 m Pressure = Density x Gravity x Height = 1000 x 10 x 5 = 50,000 N/m^2 Force on wall AB/CD = Pressure x Area = 50,000 x 12.2 = 610,000 N 2) Bottom BC is a horizontal surface with an area of 2.44 x 5 = 12.2 m^2 Pressure due to water above it is the pressure at the bottom = 50,