The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be ___________________?
(A) 2 meters of water column
(B) 3 meters of water column
(C) 3.5 meters of water column
(D) 4 m of water column
(E) none of the above
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