Question

A plane flies 600 kilometers away from its bad at 400 meters per second then flies back to its base at 600 meters per second. What is it’s average velocity?????

Answer 1

Seems to me that it flies 400 m/s there and 600 m/s back the same distance.
therefore the average of 400 and 600 is 500 m/s. The distance is the same so the normal formula of (d2-d1)/(t2-t1) is applicable.