A body revolved around the sun 27 times faster than the earth. What is the ratio

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A body revolved around the sun 27 times faster than the earth. What is the ratio of their radii?

Options

(a) 1 / 3
(b) 1 / 9
(c) 1 / 27
(d) 1 / 4

Correct Answer:

1 / 9

Explanation:

Using Kepler’s 3rd law
T^2=R^3
(1/27)^2/3=R1/R2
R1/R2=(1/3)^2=1/9.

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Topics: Gravitation (63)
Subject: Physics (2479)

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