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To 15 lts of water containing 20% alcohol, we add 5 lts of pure water. What is % alcohol.

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since 20% alcohol in 15 lit=(15*20)/100=3 lit
since total water=(15-3)+5=17
total mix=3+17=20
% of alcohol=(3/20)*100=15%
12 years agoHelpfull: Yes(29) No(1)

ans is 15%
alcohol is 20% in 15lts that means 3 lts of alcohol in 15 lts
we added 5lts means total is 20 lts and alcohol is 3lts.
% of alcohol is 3/20*100 = 15%
12 years agoHelpfull: Yes(10) No(1)
20% only because because they mentioned that adding pure water
12 years agoHelpfull: Yes(1) No(17)

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