Suppose there existed a planet that went around the sun twiche as fact as the earth. What would by its orbital size?

Explanation

`Here, T_p =(1)/(2)T_e, R_p= ?, R_e = 1A.U.`
From Keplar's Law :
`(T_p^2)/(T_e^2) = ((R_p)/(R_e))^3 = ((1)/(2))^2 = (1)/(4)`
`R_p = (0.5)^(2//3) R_e = 0.63A.U`