Question

A mixture of 40 litres of milk and water contains l0% of water. How much water should be added to this mixture so that the new, mixture contains 20% water

Answer 1

mixture of milk and water = 40 L

percent of water = 10%

liters of water = 10% of 40

= 4 L

amount of water needed to be added = 10%

= 10% of 40 = 4 L

Therefore, 4 liter of water must be added.