A mixture of 50 litres of milk and water contains 10% water. How many litres of water should be added to the mixture so that the mixture contains 15% water?
Select the correct option.
A) 15 B) 20 C) 25 D) 30 E) 10
Quantity of milk in the mixture = 90/100 (50) = 45 litres.   After adding water, milk would form 60% of the mixture.   Hence, if quantity of mixture after adding x liters of water, (60) / 100 x = 45 =&gt; x = 75   Hence 75 - 50= 
<gadget id="calculator">75 - 50</gadget>
<output>25</output>
25 litres of water must be added.   Answer: 25
<result>C</result>
A mixture of 50 litres of milk and water contains 10% water. How many litres of water should be added to the mixture so that the mixture contains 15% water?