In what ratio should water be mixed with milk, so as to gain 37.5% while selling at the cost price?
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Answer:
Let C.P. of 1 litre milk be Re. 1.
S.P. of 1 litre of mixture = Re.1, Gain = 50 %.
3
C.P. of 1 litre of mixture = 100 x 3 x 1 = 6
350 7
By the rule of alligation, we have:
C.P. of 1 litre of waterC.P. of 1 litre of milk
0 Mean Price
Re. 6
7
Re. 1
1
7
6
7
Ratio of water and milk = 1 : 6 = 1 : 6.
7 7
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