A) \[\frac{3v}{2}\]
B) \[\frac{4v}{2}\]
C) \[6v\]
D) \[12v\]
Correct Answer: C
Solution :
\[\frac{{{v}_{B}}}{{{v}_{A}}}=\sqrt{\frac{{{r}_{A}}}{{{r}_{B}}}}=\sqrt{\frac{4R}{R}}=2\] Þ \[{{v}_{B}}=2\times {{v}_{A}}=2\times 3v=6v\]
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