Dear student,
Here's how you calculate the average speed of the car
1. Calculate the total distance traveled:
Distance 1 = 39 km
Distance 2 = 25 km
Total Distance = Distance 1 + Distance 2 = 39 km + 25 km = 64 km
2. Calculate the total time taken:
Time 1 = 45 minutes
Time 2 = 35 minutes
Total Time = Time 1 + Time 2 = 45 minutes + 35 minutes = 80 minutes
3. Convert the total time to hours:
There are 60 minutes in an hour.
Total Time in hours = 80 minutes / 60 minutes/hour = 80/60 hours = 4/3 hours
4. Calculate the average speed:
Average Speed = Total Distance / Total Time
Average Speed = 64 km / (4/3) hours
Average Speed = 64 * (3/4) km/hour
Average Speed = (64 * 3) / 4 km/hour
Average Speed = 192 / 4 km/hour
Average Speed = 48 km/hour
Therefore, the average speed of the car is 48 km/hour.