A cylindrical tank is filled with water to level of $3\,\text{m}$. A hole is opened at height of $52.5\,\text{cm}$ from bottom. The ratio of the area of the hole to that of cross-sectional area of the cylinder is $0.1$. The square of the speed with which water is coming out from the orifice is (Take $g = 10\,\text{m}\,\text{s}^{-2}$)