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Question

Find out the pressure value at A point which is at a depth of 2 m from the water surface. Density of water (ρ) is =1000 kg/m2.
(Atmospheric pressure  P0 =105 Pag=10 m/s2 )
  1. 1×105 Pa
  2. 1.2×105 Pa
  3. 0.2×105 Pa
  4. 2×105 Pa


Solution

The correct option is B 1.2×105 Pa
Given:  P0 =105 Pa, h=2 m, g=10 m/s2, ρ= 1000 kg/m2
We know that, 
Pressure in water at any point =P0+ρgh
=105+1000×10×2
=105+2×104
=1.2×105 Pa

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