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A cylinder contains 12kg of gas at press...

A cylinder contains 12kg of gas at presssure of `10^7` N/`m^2`. The qunatity of gas taken out of the cylinder, if final pressure is 3 Χ `10^6` N/`m^2` , will be (temperature of gas is constant)

A

3.6 kg

B

8.4 kg

C

4.6 kg

D

5.2 kg

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