If You Monitor Jupiter's Atmosphere and You See a Storm

Multiple Choice

If you monitor Jupiter's atmosphere and you see a storm near the equator move from a longitude of 60° west to a longitude of 80° west over six days, what is the wind speed at this storm's latitude on Jupiter? Note that these positions are measured on a coordinate system that rotates with the planet's interior, and the radius of Jupiter is 7.2 * 10⁷ m.

A) 700 m/s
B) 300 m/s
C) 100 m/s
D) 50 m/s
E) 500 m/s