If the distance between sun and earth is `3R`. Find time of revolution in years.

Options

A. `sqrt(3)` years
B. 3 years
C. 9 years
D. `3sqrt(3)` years

Explanation

`T_(2)/T_(1) = (r_(2)/r_(1))^(3//2) =((3r)/r)^(3//2)`
`T_(2)/T_(1) = 3sqrt(3)`