An artificial satellite is revolving round the earth in a circular orbit. Its velocity is half the escape velocity. Its height from earth’s surface is

Q: An artificial satellite is revolving round the earth in a circular orbit. Its velocity is half the escape velocity. Its height from earth’s surface is

(a) 6400 km

(b) 12800 km

(c) 3200 km

(d) 1200 km

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Ans: (a)