At an altitude of about 800 km, a satellite placed in a Sun-Synchronous Orbit (SSO) travels at an approximate speed of how many km per second?

Explanation

7.5. Sun-Synchronous Orbit (SSO) is a near-polar low Earth orbit where satellites pass over the same area at the same local solar time, usually at an altitude of 600-800 km, moving at about 7.5 km/s with an orbital period of 95–100 minutes.