84 km/h 105 km/h 180 km/h 210 km/h
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: An airplane flies in a straight line between two cities that are separated by 840 kilometers. If it takes 4 hours for the airplane to make the trip, what is its average speed?
Possibilities:
- 84 km/h
- 105 km/h
- 180 km/h
- 210 km/h

210 km/h