Problem $2$: The water tank shown is connected to a U$-$tube manometer that has oil with specific

gravity of $SG=1\mathrm{.}8.$ The top of the tank and the right side of the manometer are open to the

atmosphere. Given $h_1=0\mathrm{.}2m$ and $h_2=0\mathrm{.}1m$ find the height of the water, $H,$ in the tank.