The Earth's average density a. can be deduced from its volume and gravitational pull. b. is the same as rocks on the surface. c. is greater than that of an iron meteorite. d. is about the same as the core.

option A

Explanation:

Earth density can be deduced with the help of gravitational pull and the volume.

gravitational pull of the earth is equal to= ........(1)

We know, the volume of the earth, with the help of that we can calculate radius of the earth.

We know gravitational pull on earth = 9.8 m/s²

From equation (1) we can calculate the mass.

So, Density = mass/ Volume.

From the above expression we can calculate the density of earth.

Hence, the correct answer is option A

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total distance/total time

(85 + 82)/(5+3)

167/8

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