A mixture contains milk and water in the ratio 5 : 1. On adding 5 liters of water, the ratio becomes 5 : 2. The quantity of milk is:

A container contains 40 litres of milk. From this container, 4 litres of milk was taken out and replaced by water. This process was repeated further two times. How much milk is now contained in the container?

Three containers have their volumes in the ratio 3:4:5. They are full of mixtures of milk and water in ratios (4:1), (3:1) and (5:2) respectively. The contents of all these three containers are poured into a fourth container. The ratio of milk and water in the fourth container is:

A mixture contains alcohol and water in the ratio 4 : 3. If 5 liters of water is added to the mixture, the ratio becomes 4 : 5. Find the quantity of alcohol in the mixture.

Two vessels A and B contain milk and water mixed in the ratio 4 : 3 and 2 : 3 respectively. In what ratio must these mixtures be mixed to form a new mixture containing half milk and half water?

The ratio of petrol and kerosene in two mixtures is 4:3 and 2:3. How many litres of the second mixture should be mixed with 14 litres of the first mixture so that the final ratio is 1:1?

A and B are two mixtures of gold and copper in ratios 7:2 and 7:11. If equal quantities of these mixtures are melted to form a third mixture C, find the ratio of gold and copper in C.