a dishonest milkman buys milk at Rs.20 per lotre and adds 1/3 of water to it and sells the mixture at Rs .24 per litre. what is his gain?
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let he bought x litre
=now he has X+X/3=4x/3
=total selling price=4x/3×23
=32x
=cost price=20x
=gain=32x-20x=12x
=gain %=12x×100/20x=60%gain
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