The period of revolution of planet A round from the sun is 8 times that of B. The distance of A from the sun is how many times greater then tht of B from the sun ?

Options

A. 2
B. 3
C. 4
D. 5

Answer

C

Explanation

`(T_(A)//T_(B))^(2) = (R_(A)//R_(B))^(3), 64 = (R_(A)//R_(B))^(3)`
`4^(3) = (R_(A)//R_(B))^(3), R_(A) = 4R_(B)`.