Two liquids of densities ${\rho _1} an {\rho _2} ({\rho _2} = 2{\rho _1}$) are
filled up behind a square wall of side 10 m as
shown in figure. Each liquid has a height of
5 m. The ratio of the forces due to these liquids
exerted on upper part MN to that at the lower part
NO is (Assume that the liquids are not mixing)