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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 __________________?

A2 metres of water column
3 metres of water column
C3.5 metres of water column
D4 m of water column E. none of the above

Correct Answer: B. 3 metres of water column

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