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An LPG cylinder contains 15kg of butane ...

An LPG cylinder contains 15kg of butane gas at 27°C and 10 atmospheric pressure. It was leaking and its pressure fell down to 8 atmospheric pressure after one day. The gas leaked is________kg.

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The correct Answer is:
3
`DeltaP = 2 "atm" implies (p_1)/(w_1) = (p_2)/(w_2) implies 10/15 = 2/x implies x = 3 kg `.
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