Question

A bird flies with a speed u over a train which moves
with a speed v. The average speed of the bird w.r.t.
train is travelling to and fro along the train (end to end) is​

Answer 1

Answer:

the average speed of bird w.r.t. train when bird and train are moving in same direction=u-v

the average speed of bird w.r.t. train when train is moving in opposite direction to the direction of bird =u+v