A satellite is revolving round the earth in circular orbit at some height above surface of earth. It takes 3 5.26 x 103 seconds to complete a revolution while its centripetal acceleration is 9.92m /s2. Height of satellite above surface of earth is (Radius of earth m 6.37 x 106 )
(a) 70 km
(b) 120 km
(c) 170 km
(d) 220 km