1. Understand the Problem:

* The car travels 60 km in 45 minutes.

* It then travels 3 times the distance (60 km * 3 = 180 km).

* It takes 4 times the original time (45 minutes * 4 = 180 minutes).

2. Calculate the Total Time:

* Convert the total time to seconds: 180 minutes * 60 seconds/minute = 10800 seconds

3. Calculate the Total Distance:

* We already know the total distance is 180 km.

4. Calculate Speed:

* Speed = Distance / Time

* Convert distance to meters: 180 km * 1000 meters/km = 180000 meters

* Speed = 180000 meters / 10800 seconds

* Speed = 16.67 meters/second

Therefore, the speed of the car is 16.67 meters per second.