Mean density of the earth in terms of g and R

2023 Manipur 1 question

1. 1 Gravitation Medium
   If R is the radius of the earth and g is the acceleration due to gravity on the earth surface. Then the mean density of the earth will be:
   A $\dfrac{\pi RG}{12g}$ B $\dfrac{3\pi R}{4gG}$ C $\dfrac{3g}{4\pi RG}$ D $\dfrac{4\pi G}{3gR}$
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