In 165 litres of mixtures of milk and water, water is only 28%. The milkman sold 40 litres of this mixture and then he added 30 litres of pure milk and 13 litres of pure water in the remaining mixture. What is the percentage of water in the final mixture?  Select:
A) 29.35%
B) 28. 57%
C) 24. 57%
D) 27. 75%
E) 26. 57%
Initially, milk = 118.2 l, and water = 46.2 l.   40 liters is withdrawn in same ratio as it was initially, i.e., 72:28.   Remaining milk = 90 l, and water = 35 l.   Now add 30 l of milk and 13 liter of water.   Then milk = 120 l and water = 48 l.   Percentage of water = 48*100/168 = 28.57 %   ANSWER:28. 57%
<result>B</result>
In 165 litres of mixtures of milk and water, water is only 28%. The milkman sold 40 litres of this mixture and then he added 30 litres of pure milk and 13 litres of pure water in the remaining mixture. What is the percentage of water in the final mixture?