To find the final displacement of the car, we need to consider both the distance traveled and the direction.
The car travels 110 km to the north, which we can represent as a positive displacement in the north direction.
When the car turns around and travels 80 km to the south, this can be represented as a negative displacement in the south direction.
To find the final displacement, we can subtract the southward displacement from the northward displacement:
Final Displacement = Northward Displacement - Southward Displacement
Final Displacement = 110 km - 80 km
Final Displacement = 30 km
Therefore, the final displacement of the car is 30 km to the north.