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Q.

Two satellites $S_{1} & S_{2}$ are revolving in circular orbits around planet with $R_{1} = 3200 km$ and $R_{2} = 800 km$ . The ratio of speeds of satellite would be $\frac{1}{x}$ where $x =$ ___

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answer is 2.

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Detailed Solution

Using $\frac{V_{1}}{V_{2}} = \sqrt{\frac{r_{2}}{r_{1}}}$

$\frac{V_{1}}{V_{2}} = \sqrt{\frac{800}{3200}} = \frac{1}{2}$ = $\frac{1}{x}$

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