Question

If distance of a planet from the sun is 9 times the distance of Earth from the sun,the time period of revolution of planets is I need full procedure

Answer 1

hope the picture above helps

Answer 2

Explanation:

distance of a planet from the sun R1 = 9r

dist.of a earth from from the sun R1= r

time period of the earth T1 = 1yrs

time period of the planet T2 =?

from the Kepler's third law :-

[T2/T1]² = [R1/R2]³

T1 /T2 = [R1/R2] ³/²

1/T2 = [9r/r]³/²

T2 = [(3)²]³/²

T2 = (3)³

T2 = 27 yrs