One balloon had a volume of 108pi/3 cubic metres.
a.what was the diameter of the balloon?
b.The formula for the volume of a sphere is 4/3(pi)(r^2)
what is the surface area of the balloon?
The formula for volume is[tex] V = \frac{4}{3}\pi r^3[/tex]
So you can just set the volume you have to the volume formula and solve for r, which is the radius. Then the diameter is just twice that.
The formula for the area is so once you have the radius r, just plug it in in this.