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2015-04-08T14:23:32+05:30

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Pressure difference between the surface of water and pipe = ρ g h

pressure = Atm + ρ g h = density * acceleration due to gravity * height
       = 1.013 * 10⁵ Pa + 1000 kg/m³ * 9.81 m/sec² * (50 - 10) m
       = 4, 93, 700 Pa or N/m²
       = 4.873  atmospheres

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