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Question

The speed of a satellite that revolves around earth at a height 3R from earth's surface is
(g=10m/s2 at the surface of earth, radius of earth R=6400 km)
  1. 4 km s1
  2. 8 km s1
  3. 22 km s1
  4. 42 km s1

A
22 km s1
B
4 km s1
C
42 km s1
D
8 km s1
Solution
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