Question

A heron can travel an average of 400 km in 10h. What is the rate of change of distance ?

Answer 1

You're looking for speed, which is the rate of change of distance (with respect to time).

v = d/t

You are given that:
d = 400 km = 400000 m
t = 10 h = 36000 s

Therefore:
v = 400 km / 10 h = 40 km/h
OR
v = 400000 m / 36000 s = 11.1 m/s

Answer 2

Thanks for the help ! :)

Answer 3

No problem! :)