Question: ( i ) Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r , and moon B has orbital radius

(i)
Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 4r. Moon A takes 20 days to complete one orbit. How long does it take moon B to complete one orbit?
Multiple Choice
160 days
80 days
20 days
320 days

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