A) \[1:3\sqrt{2}\]
B) \[1:2\sqrt{2}\]
C) \[1:2\]
D) \[\sqrt{2}:1\]
Correct Answer: B
Solution :
From the formula \[\frac{\upsilon A}{\upsilon B}=\sqrt{\frac{{{T}_{A}}}{{{T}_{B}}}}\times \frac{rB}{rA}\] \[=\sqrt{\frac{T}{2T}}\times \frac{r}{2r}=\frac{1}{2\sqrt{2}}\]
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