ANSWER
It won't need a nefill tank.
Step-by-step explanation
The car can make 325 km with 1 liter of fuel. The distance 615 km is almost twice the distance it can make with 1 liter of fuel, so it needs almost 2 liters of fuel to travel that far. Since the fuel capacity is 28 liters, it can make the trip without needing a refill tank.