What is the approximate volume of a tree trunk is the trunk is 12 feet tall with a circumference of 4.5

We need to solve for the radius

circumference = radius * 2 * PI

radius = circumference / (2*PI)

radius = 4.5 / (6.2831853072)

radius = 0.7161972439 feet

Formula for cylinder volume:

Volume = π • r² • height

Volume = π • (0.7161972439) ^2 * 12

Volume = PI * 0.5129384922 * 12

Volume 19.3373255857 cubic feet