How Long Will 1 Kg Of Gas Last On Bbq How Long Would A 8.5kg LPG Gas Cylinder Last If Being Used By A BBQ With 5 Burners?

How long would a 8.5kg LPG gas cylinder last if being used by a BBQ with 5 burners? - how long will 1 kg of gas last on bbq

In addition, approximately how many liters 1 kg LPG?