A cube of size L×L×L, where L = 2 m, is filled with water. Find

the force that the water pressure exerts on each of the side walls. The water pressure is p = ρgh, where ρ = 2500 kg/m3, g = 9.81 m/s2 and h=depth.

you can either integrate from 0 to L or locate the center of mass on each wall.