The conversation between human and AI assistant.
A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h. What is the average speed of the car for this 80 km trip?
Can you explain how you arrived at that answer?
Certainly. To find the average speed, we need to take the total distance traveled (80 km) and divide it by the total time taken. The time taken for the first 40 km at 80 km/h is 0.5 hours (since distance = speed x time or time = distance / speed). The time taken for the second 40 km at 40 km/h is 1 hour. Therefore, the total time taken is 1.5 hours. Dividing 80 by 1.5 gives us the average speed of 53.3 km/h.