Kang and Kodos orbit the Earth in a spaceship 20,000 km above Springfield.the period of their orbit (hours) is 11.8 and findthe speed (m/s) their spacecraft travels.
b) Speed of spacecraft in meters per second
m/s
.
20,000 km above anywhere in Earth is 26380 km above the center. The spacecraft travels 2*pi*26380*10^3 meters in 11.8*3600 seconds, for a circular orbit.
Take the ratio.
3900 m/s is the speed.