Physics-
General
Easy
Question
Water is filled in a cylindrical container to a height of 3m. The ratio of the cross-sectional area of the orifice and the beaker is 0.1. The square of the speed of the liquid coming out from the orifice is (g = 10 m/s2)
- 50 m2/s2
- 50.5 m2/s2
- 51 m2/s2
- 52 m2/s2
The correct answer is: 50 m2/s2
Let A = cross-section of tank
a = cross-section hole
V = velocity with which level decreases
v = velocity of efflux
From equation of continuity 
By using Bernoulli's theorem for energy per unit volume
Energy per unit volume at point A
= Energy per unit volume at point B
Þ 
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