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Subject :NSO    Class : Class 9

The density of a planet 1 is thrice that of planet 2. The acceleration due to gravity at the surface of planet 1 is (1/9)th of that at the surface of planet 2. If the radius of planet 2 is R, then the radius of planet 1 will be

A R/3
B R/27
C 27R
D 81R


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