In a mixture of 45 litres, the ratio of acid to base is 4 : 1. How much base must be added to make the mixture ratio 3 :2?	Pick:
A) 72 lts  B) 24 lts  C) 15 lts  D) 1.5 lts  E) 2.5 lts
Base = 9 litres   Acid = 9 lts   To make the ratio of acid : base as   3 : 2,   15 litres of base must be added.   ANSWER:15 lts
<result>C</result>
In a mixture of 45 litres, the ratio of acid to base is 4 : 1. How much base must be added to make the mixture ratio 3 :2?