How many liters of water must be added to 20 liters of milk and water containing 10% water to make it 50% water? Choose the correct choice from the following options:
A) 10	B) 12	C) 14	D) 16	E) 18
By rule of alligation:   50% - 10% = 40%   100% - 50% 50  - 10= 
<gadget id="calculator">50  - 10</gadget>
<output>40</output>
40%   100% - 50% = 50%   Quantity of pure water : Quantity of the mixture  100  - 50= 
<gadget id="calculator"> 100  - 50</gadget>
<output>50</output>
50%   Quantity of pure water : Quantity of the mixture= 4 : 5   There are 20 liters of mixture, so we need to add 16 liters of pure water.   The answer is 16.
<result>D</result>
How many liters of water must be added to 20 liters of milk and water containing 10% water to make it 50% water?