A cylinder of $5$ litre capacity, filled with air at $N.T.P.$ is connected with another evacuated cylinder of $30$ litres of capacity. The resultant air pressure in both the cylinders will be ...... $cm$ of $Hg$
  • A$38.85$
  • B$21.85$
  • C$10.85$
  • D$14.85$
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