Physics question?

Question

The period of the earth around the sun is 1 year, and it is at a distance of 150 million kilometers from the sun. An asteroid in a circular orbit around the sun is at a distance of 632 million kilometers from the sun. What is the period, Ta, of the asteroid orbit in years.

Answer 1

What you need to know is that the orbital period is proportional to the distance raised to the 3/2 power. So your answer would be

(632/150)^(1.5) * 1year

Answer 2

Please, look the Kepler laws.

I think is the third laws..you only need to replace the data