At what height from the surface of earth the gravitation potential and the value

At what height from the surface of earth the gravitation potential and the value of g are -5.4 x 107 J kg -2 and 6.0 ms-2 respectively? Take the radius of earth as 6400 km:
(a) 2000 km
(b) 2600 km
(c) 1600 km
(d) 1400 km

Anurag Mishra Professor Asked on 2nd May 2016 in Physics.
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    Answer: (b) 2600 km 

    Anurag Mishra Professor Answered on 6th May 2016.
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