Velocity

A truck travels from point A to B in 3 hours. It returns back to point A in 5 hours. Points A and B are 150 miles apart along a straight road. Which of the following statements most accurately describes the motion of the car?

• The total displacement of the trip is 300 miles.
• The average speed is 37.5 miles per hour
• The car travels at 50 mph for the first half and 30 mph for the second half.