9000072906

The reservoir in the form of a box is filled with the water. The vertical side of the box is $50\mathrm{cm}$ height and $40\mathrm{cm}$ long. Find the total force which acts on this side. The mass density of the water is $1000{\mathrm{kg}\mathrm{m}}^{-3}$ and the standard acceleration of gravity is $g=9.81{\mathrm{m}\mathrm{s}}^{-2}$.