The radius of orbit of a planet is two times that of the earth. The time period

The radius of orbit of a planet is two times that of the earth. The time period of planet is

Options

(a) 4.2 year
(b) 2.8 year
(c) 5.6 year
(d) 8.4 year

Correct Answer:

2.8 year

Explanation:

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