The period of a satellite of the earth very near to the surface of the earth is ${\mathrm{T}}_0.$  What is the approximate period of the geostationary satellite in terms of   ${\mathrm{T}}_0?$ (Height of geostationary satellite above the surface of earth is 36000km)

• A

  ${\mathrm{T}}_0/\sqrt{7}$

• B

  $\sqrt{7}{\mathrm{T}}_0$

• C

  $7{\mathrm{T}}_0$

• D

  $7\sqrt{7}{\mathrm{T}}_0$