How much is the cow yield from anaerobic digestion that can be obtained?

How much is the cow yield from anaerobic digestion that can be obtained? Correct Answer 0.4 m3/Kg dung

The cow yield from anaerobic digestion is 0.4 m3/Kg dung. Animal manure and kitchen waste contain a lot of organic matter and generally, the process produces enough biogas for the family to cover cooking requirements.

Related Questions

Statement (I): Anaerobic sludge digester, by itself, is considered to be the better method than other methods of sludge treatment: Statement (II): During anaerobic sludge digestion, CH4 is produced; also rodents and other pests are attracted when digester sludge is dried. 
Which of the following is correct regarding anaerobic digestion in the sludge digestion process?