The radii of circular orbits of two satellite `A` and `B` of the earth are `4R` and `R`, respectively. If the speed of satellite `A` is `3v`, then the speed of satellite `B` will be

Explanation

As, `upsilon_(0) = sqrt((GM)/(R ))`,
So, `3 upsilon = sqrt((GM)/(2R))` and `upsilon' = sqrt((GM)/(R ))`
`:. (upsilon')/(3upsilon) = 2` or `upsilon' = 6 upsilon`