Acid and water mixed in the ratio `3: 2` to make a 100 litre mixture. How many litres of acid should be added to change theratio to `3: 1 ?`

The quantities of three water tanks are in the ratió 2: 3: 5 . The smallest of them can hold 2500 litres. How many litres can the other two hold?

To paint a house, 24 litres of paint was mixed with 3 litres of turpentine. How many litres of turpentine should be mixed with 32 litres of paint?

How much water should be added to 3M HCl to get 1L 0.25M HCl ?

A manufacture have 600 litres of a 12 % solution of acid. How many litres of a 30 % acid solution must be added to it so that acid content in the resulting mixture wil be more than 15 % but less than 18 % ?

A bottle can hold (3)/(4) litre of milk. How many litres of milk is there in 7 such bottles?