Question -
Answer -
Answer: Lesser by a factorof 0.63
Time taken by the Earth tocomplete one revolution around the Sun,
Te = 1 year
Orbital radius of the Earth in itsorbit, Re = 1 AU
Timetaken by the planet to complete one revolution around the Sun, 
Orbital radius of the planet = Rp
From Kepler’s third law ofplanetary motion, we can write:
Hence,the orbital radius of the planet will be 0.63 times smaller than that of theEarth.