Question
Milk costs Rs. 48 per litre. Water is free. In what
ratio should water be mixed with milk so that the mixture can be sold at Rs. 48 per litre and still give 20% profit?Solution
ATQ, Selling price of mixture = 48 For 20% profit: CP of mixture per litre = 48/1.2 = 40 Let milk : water = m : w Cost per litre of mixture = (48m + 0*w)/(m + w) = 40 48m = 40m + 40w 8m = 40w m/w = 5/1 So milk : water = 5 : 1 Asked water mixed with milk => water : milk = 1 : 5, but options are in milk:water form. Milk : Water = 5 : 1
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