Physics Problem Satellites in Circular Orbits: What is the orbital speed of the second satellite?

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70 X 10(to the 4th power) m/s, and the radius of the orbit is 5.25 X 10(to the 6th power) m. A second satellite also has a circular speed around this same planet. The orbit of this second [...]