Find the average speed of a car that travels 45 km in 2 hours and 15 minutes.

To find the average speed, we first need to convert the time to hours.

2 hours and 15 minutes is equal to 2.25 hours (since 15 minutes is 0.25 of an hour).

Average speed = Total distance / Total time
Average speed = 45 km / 2.25 hours
Average speed = 20 km/h

Therefore, the average speed of the car is 20 km/h.

First, we need to convert the time to hours:

2 hours 15 minutes = 2 hours + 15 minutes/60 minutes/hour = 2.25 hours

Now, we can calculate the average speed using the formula:

Average speed = Distance/Time

Average speed = 45 km/2.25 hours

Average speed ≈ 20 km/h

Therefore, the average speed of the car is approximately 20 km/h.