Pure Milk contains 89% water. How much water should be added to form a sample of 22 litre containing 90% water?
2 liters
5 liters
3 liters
1 liter
Explanation:
A sample of 22 liter containing 90% water will have 10% milk i.e. 2.2-liter milk.
2.2-liter milk in a mixture of 11% milk means total mixture is 100 $\times$ 2.2/11= 20 liter.
So, 2-liter water should be added in 20-liter mixture of 89% water to make it 22-liter mixture having 90% water.