The time period of a geostationary satellite at a height 36000 km is 24 hrs. A spy satellite orbits very close to earth surface . What will be its time period

Q: The time period of a geostationary satellite at a height 36000 km is 24 hrs. A spy satellite orbits very close to earth surface (R = 6400 km). What will be its time period

(a) 4 hrs

(b) 1 hrs

(c) 2 hrs

(d) 1.5 hrs