An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.

Given, radius of the orbit = 42250 km

Therefore, circumference of the orbit =\( 2× \pi × 42250 \) km = 265571.42 km

Time taken for the orbit = 24 hours

Therefore, speed of the satellite = 11065.4 km.h^-1

The satellite orbits the Earth at a speed of 11065.4 kilometers per hour.