The speed of satellite or orbital speed is given by below formula.
V = sqrt (GM/R)
where
G = is the gravitational force
M = earth's mass
R = radius of its orbit.
Solving for the Orbital Speed,
First add the earth's radius to the height of satellite wrt to the earths surface, we have R = 6.59x10^6 m + 4.8 x 10 6 m = 11.39x10^6
Now
V = sqrt ((6.673 x 10-11*5.98x1024 kg)/11.39) =5919 m/s
