A car travels 90 km at 45 km/h and returns at 30 km/h. What is average speed for the whole trip?
Q1. A car travels 90 km at 45 km/h and returns at 30 km/h. What is average speed for the whole trip?
Answer: 36 km/h
Explanation: Time going is 2 hours and return is 3 hours. Total distance 180 km in 5 hours gives 36 km/h.