Question

If a man buys 1ltr of milk for rs12 and mixes it with 20% of water and sells it for rs.15,then what is the percentage gain

Answer 1

\cost of 1 liter pure milk= 12

cost of 1.2 liter impure mik = 12

selling price of 1.2 liter im milk= 1.2×15=18

gain =sp- cp=18-12=6

gain% =gain/cp*100

i.e 50%