A car travels from city A to city B at a speed of 60 km/h and returns at 40 km/h. What is the average speed for the entire trip?
Q1. A car travels from city A to city B at a speed of 60 km/h and returns at 40 km/h. What is the average speed for the entire trip?
Answer: 48 km/h
Explanation: Average speed = Total distance / Total time. For distance 'd', total time = d / 60 + d / 40. Simplifying gives average speed = 2d / (d / 60 + d / 40) = 48 km/h.