A circular plate of radius 2 feet is submerged vertically in

A circular plate of radius 2 feet is submerged vertically in a liquid (weighing 50 pounds per cubic foot) so that its center is 4 feet below the surface. Find the fluid force on one side of the plate.

According to Archimedes the pressure is uniform throughout the volume. The force is the product of pressure and area of contact with the fluid. F = PA = 50*4*p2² = 2513 lb