The formula to find the volume of a sphere is: V= [tex] \frac{4}{3} \pi r^{3} [/tex]
Since the diameter is 18 cm, so the radius is equal to r=18/2 = 9
Now we replace r by it's value, so we get:
[tex] \frac{4}{3} \pi 9^{3} [/tex]
[tex] \frac{4}{3} \pi 729[/tex]
[tex]972 \pi [/tex]
And we get approximately [tex]3053.63 cm^{3} [/tex]
Hope this Helps :D
