Question

There are three planets in circular orbits around a star at a distance a, 9a and 16a respectively. At time t = $t_0$, the star and the planets are in a straight line. The period of revolution of the closest planet is T. How long after $t_0$, will they again be in the same line?

• A. 216 T
• B. 512 T
• C. 1728 T
• D. 3456 T

Answer 1

Answer: (C)

1728 T

Answer 2

The correct option is (C):1728 T