Step-by-step explanation:
Given that,
The time taken from A to B is 3 hours
The time from B to A = 5 hours
The total distance between A and B is 150 miles
The average velocity from A to B,
![v=(150)/(3)=50\ mph](https://img.qammunity.org/2022/formulas/physics/high-school/j6x26j4mkiub3i7pu5b9we1ry1vcxbre99.png)
The average velocity from B to A,
![v=(150)/(5)=30\ mph](https://img.qammunity.org/2022/formulas/physics/high-school/9ps32j5z8d7c4l1302z8jw539oq74dwykd.png)
As the velocity of an object is a vector quantity. It means when the car reaches the initial point, the displacement is 0. So, the average velocity is equal to 0.