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imagine a new planet having the same den...

imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth is size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then find the relation between g and g'.

A

g'=g/9

B

g'=27g

C

g'=9g

D

g'=3g

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