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A satellite of mass m revolves around th...

A satellite of mass m revolves around the earth of radius R at a hight x from its surface. If g is the acceleration due to gravity on the surface of the earth, the orbital speed of the satellite is

A

`(gR^(2))/(R+X)`

B

`(gR)/(R-X)`

C

gx

D

`((gR^(2))/(R+X))^(1//2)`

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