A hole is made at the bottom of a tank filled with water. If the total pressure at the bottom of tank is 3 atmosphere and density of water is 1000 kgm−3, then the velocity of efflux is
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a
20 ms−1
b
102 ms−1
c
106 ms−1
d
105 ms−1
answer is A.
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Detailed Solution
Loss in pressure energy = Gain in kinetic energy ΔP=12ρv2⇒ v=2ΔPρ⇒ v={2×(3−1)atoms103}⇒ v={2×2×105103}=20 ms−1