A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite B of mass 2m is at a distance of 2r from the earth’s centre. Their time periods are in the ratio of

(a)      1 : 2                                         (b)     1 : 16

(c)   1 : 32                                         (d)   1: 2√2

Answer: d

(1)