A Navy candidate drives 60 km to the selection centre at 40 km/h and returns by the same route at 60 km/h. What is the average speed for the whole trip?
Q1. A Navy candidate drives 60 km to the selection centre at 40 km/h and returns by the same route at 60 km/h. What is the average speed for the whole trip?
Answer: 48 km/h
Explanation: Total distance is 120 km and total time is 1.5 plus 1 hour, which is 2.5 hours. Average speed is 120 divided by 2.5, giving 48 km/h.