Subject: mathqa
Question: 15 lts are taken of from a container full of liquid a and replaced with liquid b . again 15 more lts of the mixture is taken and replaced with liquid b . after this process , if the container contains liquid a and b in the ratio 9 : 16 , what is the capacity of the container h ?
Option: 
A: c : 37.5
B: e : 42
C: b : 25
D: d : 36
Answer: A