Answer: The average speed of the car is 32 km/hr
Step-by-step explanation:
Average speed is defined as the ratio of total distance traveled to the total time taken.
To calculate the average speed of the runner, we use the equation:

We are given:
Total distance traveled = (60 + 68) km = 128 km
Total time taken = (2 + 2) hr = 4 hr
Putting values in above equation, we get:

Hence, the average speed of the car is 32 km/hr