Water stands at a depth of $1 m$ in an enclosed tank whose side walls are vertical. The space above the water surface contains air at a gauge pressure of $8\times {10}^5 Pa$. The tank rests on a platform $2 m$ above the floor. A hole of cross-sectional area $1 c{m}^2$ is made in one of the side walls just above the bottom of the tank.

 $\left[\mathrm{Take} \mathrm{g}=10.24 {\mathrm{ms}}^{-2} ; {\mathrm{\rho }}_{\mathrm{w}}={10}^3 {\mathrm{kgm}}^{-3}\right]$