Question

A cylinder of height 20m is completely filled with water. The velocity of efflux of water (in ms^–1) through a small hole on the side wall of the cylinder near its bottom is

(a) 10 

(b) 20 

(c) 25.5 

(d) 5.

Answer 1

(b) : v = √(2gh) = √(2 x 10 x 20) = 20m/s.