Australian AMC 2014 - Senior Question 21

Question 21

Starting with $2/3$ of a tank, I drive the 550 km from Scone to Canberra. At Morisset,165 km from Scone, $1/2$ a tank remains. With the same fuel consumption per kilometre and no refuelling, what happens?

Arrive with $1/9$ tank left
Arrive with $1/20$ tank left
Run out exactly at Canberra
Run out 110 km before Canberra
Run out 220 km before Canberra