Question

5.
A mixture of 20 litres of milk and water contains 10% of water. How much water should be added to it to increase the percentage of water to 25%?​

Answer 1

Step-by-step explanation:

Let water to be added is x litres to make the solution have 25% water

therefore,

solving this equation, x = 4.

Lets put this back in the equation to double check if it is indeed the correct answer. If we add 4 litres of water, then percentage of water = %