Answer :
Velocity can be defined by the ratio of the distance traveled by object and time. The velocity of the person will be 0.142 km/min.
Velocity:
[tex]v = \dfrac dt[/tex]
Where,
[tex]v[/tex] - velocity
[tex]d[/tex] - distance = 3000 m = 3 km
[tex]t[/tex] - time - 21 min
Put the values in the formula,
[tex]v = \dfrac 3{21}\\\\v =0.142 \rm \ km/min[/tex]
Therefore, the velocity of the person will be 0.142 km/min.
Learn more about Velocity:
https://brainly.com/question/14726890
velocity = distance / time v= d/t firstly you change 3000 m into km distance D = 3000/1000 = 3 km secondly time t = 21 min using velocity formula v = d/t = 3 km/21min =0.142km/min
