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A milkman makes 20% profit by selling milk mixed with water at Rs. 9 per litre. If the cost price of 1 litre pure milk is Rs. 10, then the ratio of milk and water in the said mixture is

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3 : 1

Cost price of 'm' liters of pure milk @10 Rs/liter=10m
If 'w' liters of water is added to pure milk then Selling Price @9 Rs/liter=9(m+w)
Here profit is 20%, so (120/100)*10m=9(m+w)
3m=9w
m/w=9/3=3/1
8 years agoHelpfull: Yes(0) No(1)

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