Problem $4\mathrm{.}6\mathrm{.}3$

The tank shown in Fig. P$4\mathrm{.}6\mathrm{.}3$ contains air at atmospheric pressure above the water surface. The velocity of the water flowing from the tank is $\backslash (7\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash ).$ Determine the water level $\backslash (($h$)\backslash ).$

Figure P$4\mathrm{.}6\mathrm{.}3$