Presure at the bottom of a tank is 3P, where P is the atmospheric pressure. If the water is drawn out till the level of water is lowered to one fifth, then what is the pressure at the bottom of the tank?
given dgh=2p (d=density of water)
as h reduced to h/5, so we need dgh/5= 2p/5
so pressure at bottom= p + 2p/5
= 7p/5
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