A container has 100 litres of milk. From this container, 10 litres of milk was taken out and replaced by water. The process was further repeated twice. The volume of milk in the container after that is

A 60 liter mixture of milk and water contains 10% water. How much water must be added to make water 20% in the mixture?

A milkman mixes 30 liters of water with 70 liters of milk. After selling one fourth of this mixture, he adds water to replenish the quantity that he has sold. What is the current proportion of water…

Three equal jugs contain milk and water in ratios 1:2, 2:3 and 3:4 respectively. If mixed together, the ratio of milk to water is

A 20 liter mixture contains 30% alcohol and 70% water. If 5 liters of water is added to the mixture, what will be the percentage of alcohol in the new mixture?

Two glasses of equal volume are filled with a mixture of alcohol and water in the ratio 3 : 2 and 4 : 1, respectively. These glasses are emptied into a third glass. What is the ratio of alcohol and w…