Aplane travels 350 km south along a straight path with an average velocity of 125 km/h to the south. the plane has a 30 minute layover, and then travels 220 km south with an average velocity of 115 km/h to the south. what is the average velocity for the trip? . a.120 km/hr to the south. b.110 km/hr to the south. c. 121 km/hr to the south. d. need more information

b) Towards South

Explanation:

First plane moves with uniform velocity of 125 km/h towards South

so time taken by the plane to move 350 km is given as

Now it has a layover time of 30 min

then it moves with uniform velocity of 115 km/h towards South

so time taken by the plane to move 220 km is given as

Now we have total displacement of the plane is

total time of the journey is given as

now average velocity is given as

Towards South

e/c, where e is its total energy