If R is the radius of the earth and g the acceleration due to gravity on the earth’s surface, the mean density of the earth is

a) 4π G/3gR

b) 3π R/4gG

c) 3g/4π RG

d) πRg/12G

# If R is the radius of the earth and g the acceleration due to gravity

If R is the radius of the earth and g the acceleration due to gravity on the earth’s surface, the mean density of the earth is

a) 4π G/3gR

b) 3π R/4gG

c) 3g/4π RG

d) π Rg/12G