milkman purchased 30 litres of milk at rupees 20 per litre and delete it by mixing litre of water at what rate should he sell milk to earn 10% profit
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When the water is freely available and all the water is sold at the price of the milk, then the water gives the profit on the cost of 20 litres of milk.
cost of 20 litres milk =20×18=360
cost of the 25 litres of milk after mixing the water =25×18=450
profit percent =S.Pprofit×100
=45090×100=20%
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