Question

the square of its period of revolution around the sun is directly proportional to the cube of the mean distance of a planet from the sun is​

Answer 1

Answer:

here is your answer mate !!

Explanation:

According to Kepler's third law of planetary motion, square of the time period is proportional to the cube of the mean distance from the sun.

According to Kepler's Law

Where, a is the mean distance to the cube of the mean distance of a planet from the sun.

hence directly proportional