In a mixture of 45 litres the ratio of milk to water is 4:1. Additional 21 litres of water is added to the mixture. Find the ratio of milk to water in the resulting mixture.
Choose one:
A) 2/1
B) 4/1
C) 6/5
D) 3/4
E) 3/2
Given that Milk/Water=4x/x and 4x+x=45 --&gt; x=9.   Thus Milk=4x=36 liters and Water=x=9 liters.   New ratio = 36/(9+21) = 36/30 = 6/5.   Answer: 6/5.
<result>C</result>
In a mixture of 45 litres the ratio of milk to water is 4:1. Additional 21 litres of water is added to the mixture. Find the ratio of milk to water in the resulting mixture.