UPSEE Solved Model Paper 7

Let po is the atmospheric pressure, ρ the density of liquid and v the velocity at which water is coming out.
Applying this Bernoulli's theorem just inside and outside the hole.
Pinside+ρgh+0 = Poutside+

ρv2

2

⇒ P0+ρgh = P0+

ρv2

2

⇒ v = √2gh
= √2×10×20
= 20 ms−1