Determine what the period of revolution of the Earth would be if its distance from the Sun were 6.5 AU rather than 1 AU. Assume that the mass of the Sun remains the same.

Question

answer should be in years

Answer 1

Kepler's 3rd Law: r³ (AU) = T² (yr) for our solar system. T² = (6.5)³ = 275, T = 16.6 years.