A vessel containing $5\, litres$ of a gas at $0.8 \,pa$ pressure is connected to an evacuated vessel of volume $3$ litres. The resultant pressure inside will be ...... $pa$  (assuming whole system to be isolated)
  • A$4/3 $
  • B$0.5 $
  • C$2.0 $
  • D$3/4 $
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