To find the average speed of the car, you can use the formula:
\[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} \]
Here, the total distance is 120 miles and the total time is 2 hours. Plugging in these values, we get:
\[ \text{Average Speed} = \frac{120 \text{ miles}}{2 \text{ hours}} = 60 \text{ miles per hour} \]
So, the car's average speed is 60 miles per hour.