A car travels the first half of a journey at an average speed of 60 km/h and the second half at an average speed of 40 km/h. What is the average speed for the entire journey?

✓ Correct Answer: Option A

Let total distance be 2d. Time1 = d/60, Time2 = d/40. Total time = d/60 + d/40 = 5d/120 = d/24. Average speed = Total Distance / Total Time = 2d / (d/24) = 48 km/h.