Volume of Sphere formula is
[tex]v \: = \: \frac{4}{3} \pi \: r ^3 \\ \\ where \: \\ \pi \: = \: 3.14 \\ r \: = \: 20 \: dm \\ \\ solve \: for \: v \\ \\ v \: = \: \frac{4}{3} \pi \: r ^3 \\ \\ v \: = \: \frac{4}{3} (3.14)(20)^3 \\ \\ v \: = 33493.33 \: dm^3[/tex]
