Taking that earth revolves round Sun in a circular orbit of radius `15xx10^(10)`m, with a time period of 1 year, the time taken by another planet, which is at a distance of `540xx10^(10)`m, to revolve round the Sun in circular orbit once, will be:

Options

A. 216 years
B. 144 years
C. 72 years
D. 36 years

Answer

A

Explanation

Apply Kepler.s law `(T_(2)^(2))/(T_(2)^(2))=((R_(1))/(R_(2)))^(3)`
Thus correct choice is (a).