Posted by Real on .
In a binary star system, two stars orbit about their common center of mass, as shown in the figure .
If r2 = 2r1,
what is the ratio of the masses m2/m1 of the two stars?

Physics 
Neeraj,
ratio of the radii is the same as the ratio of the masses for binary system.
so then m2/m1 would just be .5