To calculate the average speed, we can use the formula:
Average speed = Total distance traveled / Total time taken
First, let's calculate the total distance traveled.
Distance traveled at 50 km/hr for 3 hours = 50 km/hr * 3 hours = 150 km Distance traveled at 60 km/hr for 2 hours = 60 km/hr * 2 hours = 120 km
Total distance traveled = 150 km + 120 km = 270 km
Now, let's calculate the total time taken.
Total time taken = 3 hours + 2 hours = 5 hours
Finally, we can calculate the average speed.
Average speed = Total distance traveled / Total time taken = 270 km / 5 hours
Average speed = 54 km/hr
Therefore, the average speed of the car over the given time period is 54 km/hr.