A car travels from city A to city B at 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 60 km/h and returns at 40 km/h. What is the average speed for the entire trip?
Answer: 48 km/h
Explanation: Let's denote the distance from A to B as d. Total distance = 2d. Time taken from A to B = d / 60, from B to A = d / 40.