What is the periodic times of a satellite revolving very close to the surface of the earth, of density `rho` ?

If T is the period of a satellite revolving very close to the surface of the earth and if rho is the density of the earth, then

If rho is the mean density of the earth and R is its radius, then the critical speed of a satellite revolving very close to the surface of earth is :

These orbital speed of satellite revolving very close to earth

What is the time period of a satellite very close of the earth surface?

Assertion : The time period of a satellite revolving very close to the surface of earth is less. Reason : According to Kepler's law, square of time period of revolution is directly proportional to the cube of semi-major axis.

What is the relation between the period of revolution of a satellite (revolving close to the earth surface) and the density of the earth?