Volume of a cylinder = π r² h
π = 3.14
Log: r = 7.5 inches ; h = 28 inches
Volume of the log = 3.14 (7.5in)² 28in
V = 3.14 56.25 in² 28 in
V = 4,945.5 in³
cylindrical shape: r = 5.5 inches ; h = 28 inches
V = 3.14 (5.5in)² 28in
V = 3.14 30.25 in² 28in
V = 2,659.58 in³
Volume of the remaining portion of the log:
4,945.50 in³ - 2,659.58 in³ = 2,285.92 in³