If the cost price of pure milk is Rs 40 per litre and water is available free of cost then find the ...........

Quantitative Aptitude (SBI-PO) Mixture and Alligation

Direction: Study the following information and answer the following questions.
A dishonest milkman has X litre mixture of milk and water in the ratio 5 : 1 respectively. He sold mixture to three persons A, B and C in the same order. After selling milk to each person, he added certain amount of milk or water or both in the remaining mixture. The difference between milk and water with the milkman just before selling it to person C is 250 L.
The table given below shows how the exchange took place.

If the cost price of pure milk is Rs. 40 per litre and water is available free of cost, then find the percentage profit earned by the milkman on selling the mixture of milk to B, if he sold it at Rs. 45 per litre.

25%

26.5%

30%

31.25%

34.5%

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Explanation:

Amount of pure milk sold to B = 240 Litres
Cost of 240 Litres pure milk = 240 × 40 = Rs. 9600
Total amount of mixture sold to B = (240 + 40) = 280 Litres
Total selling price of 280 Litres mixture of milk = 280 × 45 = Rs. 12600
Profit = 12600 – 9600 = Rs. 3000
Required Profit Percentage =3000/9600=31.25%
Hence, option 4 is the correct answer.