How much water must be added to a cask which contains 30 liters of milk at the cost price of Rs 5 li...........

Quantitative Aptitude (CDS) Mixture and Alligation

How much water must be added to a cask which contains 30 liters of milk at the cost price of Rs.5/liter so that the cost of

Does milk reduce to Rs.3/liter?

20 liters

35 liters

45 liters

None of these

Explanation:

This question can be solved in so many different ways.
But the method of alligation method is the simplest of
all the methods. We will apply the alligation on the price
of milk, water, and mixture.
Therefore , ratio of milk and water should be = 5 – 3 / 3-0 = 2/3
Thus, added water = 30×3/2
= 45 liters

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