The radii of Earth and Pluto are 6,371 kilometers and 1,161 kilometers, respectively. Approximately how many spheres the size of Pluto does it take to have the same volume as Earth?

Question

campbell_st · Answer

find the ratio of radii    Earth:Pluto

this is the linear scaling factor 

the cube the answer to find how many pluto's make the earth

anonymous · Answer

does somebody know the answer

campbell_st · Answer

or the long way use the volume of a sphere

$$V = \frac{4}{3} \pi r^3$$

find the volume of the earth

find the volume of pluto

then divide  Volume of earth by volume of pluto