Topic : Kepler's 3rd Law - The Law of Periods

Use the formula , T1 / r1 = T2/ r2

1. Mars takes 1.88 years to complete one orbit around the sun. What is its average distance from the sun ?

2. The mean distance of an object A from the Sun is 19.6 x 10 km and the mean distance of object B from the Sun is 57.9 x 10 km. The period of Earth's revolution is 1 year , what is the period of object B's revolution ?