In a mixture of 60 liters, the ratio of milk and water is 2:1. What amount of water must be added to make the ratio of milk and water as 1:2?	Options.
A) 20 liters  B) 30 liters  C) 60 liters  D) 29 liters  E) 82 liters
2:1 --- 60   1:2   2:4   ---------------   3   3 ----------- 60   3 ----------- ? =&gt; 60 liters   Answer:60 liters
<result>C</result>
In a mixture of 60 liters, the ratio of milk and water is 2:1. What amount of water must be added to make the ratio of milk and water as 1:2?