A) \[v=R\sqrt{\frac{8\pi }{3}G\rho }\]
B) \[v=M\sqrt{\frac{8\pi }{3}GR}\]
C) \[v=\sqrt{2GMR}\]
D) \[v=\sqrt{\frac{2GM}{{{R}^{2}}}}\]
Correct Answer: A
Solution :
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