10 km/h 20 km/h 40 km/h 50 km/h
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In one day, a family in a car rode for 2 hours, stopped for 3 hours, and then rode for another 5 hours. During the day, the family traveled a total distance of 400 kilometers. What was their average speed for the whole trip?
Possibilities:
- 10 km/h
- 20 km/h
- 40 km/h
- 50 km/h

40 km/h