Question

Q17. A 180 metre long train is moving due north at a speed of 25 m/s. A
small bird is flying due south, a little above the train, with a speed of 5 m/s.
The time taken by the bird to cross the train is: (in s)​

Answer 1

Answer:

birdie velocity= -5ms

train velocity=25ms

now we will check the velocity of the birdie in relation with the train... that would be = 25-(-5)

=30ms

according to formula=time =distance/speed.. which is 180/30

your answer is 6seconds