Answers

2015-06-20T11:21:20+05:30
30 litre mixture of milk and water 
90% of mix is milk =30*90/100=27 litre milk and 3 litre water 
when the percent of milk become 80% i.e.,30*80/100=24 litre milk 
⇒amnt of water that must be added to make 80%milk is 6 litre

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