Two satellites \( A \) and \( B \) go round a planet in circular orbits having radii \( 4 R \) a...

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Two satellites \( A \) and \( B \) go round a planet in circular orbits having radii \( 4 R \) and \( R \), respectively. If the speed of satellite \( A \) is \( 3 v \), then speed of satellite \( B \) is
[Pb. PET 2004; CBSE PMT 2010]
(a) \( \frac{3 v}{2} \)
(b) \( \frac{4 v}{2} \)
(c) \( 6 v \)
(d) \( 12 v \)
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