Two equal glasses filled with mixture of milk and water in the proportion of 2 : 1 and 1 : 3 respectively are emptied entirely into a third container.
What is the proportion of milk and water in the third container ?
A container contains 40 litres of milk. From this container 8 litres of milk was taken out and replaced by water.
This process was repeated two more times.
Then the quantity of milk in the container is ___ litres.
