Question

In 50 litres of milk, there was 10% water. how much water shud be added more to this mixture to make the water 25%?

Answer 1

The amount of water at 10% is :

10/100 × 50 = 5 litres

If the percentage becomes 25% then :

10% = 5 litres

25% =?

25/10 × 5 = 12.5 litres

The amount to be added is :

12.5 - 5 = 7.5 litres