A) 3.5 km/s
B) 7 km/s
C) 72 km/s
D) 14 km/s
Correct Answer: A
Solution :
\[v\propto \frac{1}{\sqrt{r}}.\] If orbital radius becomes 4 times then orbital velocity will become half. i.e. \[\frac{7}{2}=3.5\ km/s\]You need to login to perform this action.
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