Question

a cylindrical tank of 2m diameter is laid with its axis horizontal and is filled with water just to the top,the force on one of its end plate in kn is

Answer 1

$$F=mg=\rho g V =0.25\pi d^2 h\rho g \\F =0.25\pi (2)^2 (4)(9.8)(1)=123\ kN$$