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 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?

In a mixture of 70 kg, the ratio of sand and cement is 4 : 1. How much sand should be added to the mixture so that the ratio of said and cement in it becomes 6 : 1?

A bottle contains spirit and water in the ratio 1 : 4 and another identical bottle contains spirit and water in the ratio 4 : 1. In what ratio should the mixtures in the two bottles be mixed to get a…

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 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…