Question

a bird flies from tree A to the tree B with the speed of 40km/hr and returns to tree A from tree B with the speed of 60km/hr. What is the average speed of the bird during this journey?​

Answer 1

Answer:

50km/hr

Explanation:

Answer 2

Explanation:

let the distance between tree A and tree B be d

time taken to travel from tree A to tree B = distance/speed

= d / 40

time taken to travel from tree B to tree A = d / 60

average speed = total distance traveled / total time taken

= (d + d) /(d/40 + d /60)

= 2d / (3d +2d)/120

= 2d ×120/ 5d

= 2 × 24

= 48km/h