Two satellites A and B go around a plane...

Two satellites A and B go around a planet in circular orbits of radii 4 R and R respectively. If the speed of the satellite A is 3 V, then the speed of the satellite B will be

12V

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The correct Answer is:

`v=sqrt((GM)/R)implies(v_(A))/(v_(B))=sqrt((R_(B))/(R_(A)))`

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