A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in $\mathrm{ms}^{-1}$) through a small hole on the side wall of the cylinder near its bottom is (1) 10 (2) 20 (3) 25.5 (4) 5
A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in $\mathrm{ms}^{-1}$) through a small hole on the side wall of the cylinder near its bottom is\\
(1) 10\\
(2) 20\\
(3) 25.5\\
(4) 5