Respuesta :

21343 km / 150 km/hr = 142.29 hrs

The storm will take 142.19 sec  to encircle the planets equator

The Equatorial radius is the distance between a planet's center and its surface. Therefore, planetary radius is a measure of a planet's size

Equatorial radius of mars = 3396.2 km

circumference = 2πr

                        = 2 * 3.14 * 3396.2

                        = 21328.14 km

distance travelled by the storm will be 21328.14 km

distance = speed * time

time = distance / speed

       = 21328.14 / 150

       = 142.19 sec

The storm will take 142.19 sec  to encircle the planets equator

To learn more about Equatorial radius here

https://brainly.com/question/12048816?referrer=searchResults

#SPJ2