For a geostationary satellite orbiting around the earth identify the NOT necessary condition.

it must lie in the equatorial plane of earth its height form the surface of earth must be 36000 km it period of revolution must be 2pi√(R/g) where R is the radius of earth  its period of revolution must be 24 hrs.

it period of revolution must be 2pi√(R/g) where R is the radius of earth

A geo-stationary satellite revolves at a height 36000 km on equatorial plane with a time period of 24 h.