A satellite is to be placed in equatorial geostationary orbit around earth for communication.
(a) Calculate height of such a satellite.
(b) Find out the minimum number of satellites that are needed to cover entire earth so that at least one satellites is visible from any point on the equator.
`[M = 6 xx 10^(24) kg, R = 6400 km, T = 24 h, G = 6.67 xx 10^(-11) SI units]`

Options

A. `3.59 xx 10^5 m`
B. `3.59 xx 10^6 m`
C. `3.59 xx 10^7 m `
D. `3.59 xx 10^8 m`

Answer

C

Explanation

`3.59 xx 10^7 m `