radha bought 1.320 litre milk at rupees 48 per litre. how much did the milk cost her?
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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.P
profit
×100
=
450
90
×100=20%
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