Question

A milkman claims to sell the milk at cost price but he earns 20% profit because he adds some quantity of water in the milk.
Find the percentage of milk in the solution​

Answer 1

Answer:

76.92%

Step-by-step explanation:

Let the milk he bought is 1000 ml

Let C.P of 1000 ml is Rs. 100

Here let he is mixing K ml of water

He is getting 30% profit

=> Now, the selling price is also Rs. 100 for 1000 ml

=> 100 : K%

= 100 : 30

10 : 3 is ratio of milk to water  

=> Percentage of milk = 10 x 100/13 = 1000/13 = 76.92%

Answer 2

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