A planet is revolving around a star such that the gravitational force between them is inversely proportional to Rn, where R is the distance between the centre of the star and the planet. The time period of revolution of the planet will be proportional to

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Your question appears to be incomplete.Kindly check gravitational force proportional to Rn  is correct and if R is the radius of the planet.Please post the complete question in a new thread as soon as possible.We will be glad to assist you

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