1. The problem statement, all variables and given/known data 1.express the volume in terms of the diameter d of the sphere 2.write an equation to find the density of the sphere in terms of mass M and diameter d 2. Relevant equations sphere Volume = 4 x pi x r^3 / 3 density = mass/volume 3. The attempt at a solution 1. d=2r so V = d^3 x pi / 6 2. density = M / V(=d^3 x pi /6) = 6M/pi x d^3 but my teacher said it is wrong. what is wrong with my answer?