# the ratio of water to milk, math homework

**Question description**

A can contains a mixture of two liquids A and B is the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially?

A milk vendor has 2 cans of milk. The first contains 25% water and the
rest milk. The second contains 50% water. How much milk should he mix
from each of the containers so as to get 12 litres of milk such that the
ratio of water to milk is 3 : 5?

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