In a mixture of tin and bronze 30% is tin. What amount of tin should be added to make a ratio of 60:40 in final mixture.

40 litres of a mixture of milk and water contains 10% of water, the water to be added, to make the water content 20% in the new mixture is :

The ratio of milk and water in 64 litres of a mixture is 5:3. What amount of water is added to make the ratio 3:5?

In a mixture of 60 liters, milk and water are in the ratio 2:1. find the quantity of water to be added to make the ratio 4:3