A pair of stars rotates about a common centre of mass. One of the stars has a mass Mand the other has mass m such that =2m. The distance between the centres of the stars is d ( d being large compare to the size of eithe star). The period of rotation of the stars about their common centre of mass ( in terms of d,m,G) is

A pair of stars rotates about a common centre of mass. One of the star

1.	A pair of stars rotates about a common centre of mass. One of the stars has a mass Mand the other has mass m such that =2m. The distance between the centres of the stars is d ( d being large compare to the size of eithe star). The period of rotation of the stars about their common centre of mass ( in terms of d,m,G) is
Answer» `sqrt((4 PI^(2))/(GM)d^(3))` `sqrt((8pi^(2))/(Gm)d^(3))` `sqrt((2pi^(2))/(3Gm)d^(3))` `sqrt((4 pi^(2))/(3Gm)d^(3))` ANSWER :D

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