Medium
Two satellites $A$ and $B$ go round a planet $P$ in circular orbits having radii $4R$ and $R$ respectively. If the speed of the satellite $A$ is $3V$,the speed of the satellite $B$ will be ........ $V$.
- A$12$
- B$6$
- C$\frac{4}{3}$
- D$\frac{3}{2}$
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