Subject: mathqa
Question: the fuel indicator in a car shows 1 / 5 th of the fuel tank as full . when 22 more liters of fuel are poured in to the tank , the indicator rests at the 3 / 4 of the full mark . find the capacity of the tank .
Option: 
A: 35 litres
B: 40 litres
C: 30 litres
D: none of these
Answer: B