Multiple choice

There is a 30 litre solution of milk and water in which milk forms 60%. How much water must be added to this solution to make it a solution in which the quantity of milk and water is equal?

  1. 6 litres

  2. 5 litres

  3. 7 litres

  4. 10 litres

  5. Cannot be determined
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Initial solution has 18L milk and 12L water. To make them equal (50/50), the final amount of water must equal the amount of milk (18L). Since there is already 12L of water, we need to add 18 - 12 = 6L.

AI explanation

The initial 30-litre solution contains 60% milk, which equals 18 litres of milk and 12 litres of water. For the quantities of milk and water to be equal, the 18 litres of milk must represent 50% of the new total volume. This means the final total volume is 36 litres, so subtracting the original 30 litres from 36 litres gives 6 litres of water to be added.

Keep practicing — related questions