A truck travels 20 miles east from the home office and it takes 45 minutes to ma

Question

A truck travels 20 miles east from the home office and it takes 45 minutes to make the trip. The driver realizes that he has left his cargo back at the home office so he immediately turns around and drives back toward the home office but only makes it 10 miles back to the west (he also forgot to fill up with gas) after driving (much to fast) for 15 minutes.

A. What was the average speed of the truck for the entire trip?

B> What was the average velocity of the truck for the entire trip? (Remember to include direction)

Explanation / Answer

average speed=total distance/toatl time=20+10/1=30miles/hr average velocity=total displacement/total time=20i+10j/1=20i+10j miles/hr

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