Answer:
[tex]0.0083\ \text{m/s}[/tex] north.
Explanation:
s = Displacement of the dragonfly = 40 meters north
t = Time taken by the dragonfly for the entire journey = 80 minutes = [tex]80\times 60=4800\ \text{seconds}[/tex]
Velocity is given by
[tex]v=\dfrac{s}{t}[/tex]
[tex]\Rightarrow v=\dfrac{40}{4800}[/tex]
[tex]\Rightarrow v=0.0083\ \text{m/s}[/tex]
The velocity of the dragonfly is [tex]0.0083\ \text{m/s}[/tex] north.