Use the formula density=mass/volume
Find volume of the star
I assume that the star is a sphere so volume = 4/3 pi r^2
From the volume, you can find radius :)
Consider a star with a mass of 8.7 x 1031 kg. Determine the radius of the star if a typical star has a density of 1400 kg/m3.
2 answers
Sorry the formula is 4/3 pi r^3