$!$

Required information

Gate $AB$ shown in the figure is $1\mathrm{.}2$ m long and $0\mathrm{.}8$ m into the paper. The specific gravity of the oil is $0\mathrm{.}800$ and $=40.$

Neglecting the atmospheric pressure, compute its center of pressure position $x.$

The center of pressure position, $x,$ is m $.$