SOLUTION: Find the radius of a sphere such that the ratio of the surface area in square inches to the volume in cubic inches is 4:1.

Algebra ->  Surface-area -> SOLUTION: Find the radius of a sphere such that the ratio of the surface area in square inches to the volume in cubic inches is 4:1.      Log On


   

Question 866177: Find the radius of a sphere such that the ratio of the surface area in square inches to the volume in cubic inches is 4:1.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
surface area of sphere = 4 pi r^2
Volume = 4/3 * pi r^2
4+pi+r%5E2%2F+%284%2F3+%2A+pi+r%5E3%29=4%2F1
3%2Fr+=+4%2F1
r=3/4