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A small planet is revolving around a ver...

A small planet is revolving around a very massive star in a circular orbit of Radius R with a period of revolution T. If the gravitational force between the planet and the star were proportional to `R^(-5//2)`, then T would be proportional to

A

`R^(3)`

B

`R^(7//2)`

C

`R^(3//2)`

D

`R^(15//4

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The correct Answer is:
B
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