The water in a $25-$m$-$deep reservoir is kept inside by a $90-m-$wide wall whose cross section is an equilateral triangle as shown in the figure.

Determine the total force $($hydrostatic $+$ atmospheric$)$ acting on the inner surface of the wall and its line of action. Take the value of $g$ as $9\mathrm{.}81\frac{m}{s^2},$ the atmospheric pressure as $100,000\frac{N}{m^2},$ and the density of water to be $1000k\frac{g}{m^3}$ throughout.

The total force $($hydrostatic $+$ atmospheric$)$ acting on the inner surface of the wall is $,{10}^{8}N.$

The distance of the pressure center from the free surface of water along the wall surface is m$.$