The fuel indicator in a car shows 1/5th of the fuel tank as full. When 22 more liters of fuel are poured in to the tank, the indicator rests at the 3/4of the full mark. Find the capacity of the tank.  Pick one.
A) 25 litres B) 35 litres C) 30 litres D) 40 litres E) none of these

Rationale: x / 5 + 22 = 3 x / 4 = > x = 40 litres answer : d
Answer: D