A satellite moves in a circle around earth The radius of this circle is equal to one half of the radius of the moon's orbet. The satellite completes one revolution in

Question

$a)\;\frac{1}{2}\; lunar month \\ b)\; \frac{2}{3} \;lunar\; month \\ c) 2^{\frac{3}{2}} lunar\; month\; \\ d)\; 2^{\large\frac{-3}{2}} \;lunar\; month$