325 km/h W 490 km/h W 980 km/h W 1960 km/h W
I gave my students this multiple choice question: An airplane takes off from Boston for the 980 km trip to Detroit. The plane lands two hours later. Which of the following best describes the average speed and direction of the airplane's flight?

Only one answer is correct among these 4 choices:
- 325 km/h W
- 490 km/h W
- 980 km/h W
- 1960 km/h W

Could you tell me which one is correct?

490 km/h W