Question

A communication satellite is placed in an orbit above the equator in such a way that it remains stationary above a given point on the earth below. How much high above the surface of the earth is such a synchronous orbit? (Re = 6400Km)

Answer 1

Satellite which remain stationary above the point of earth known as geostationary satellite.

It's times period is 24hours.

And it should be at 35786km above the equator of earth.