The approximate volume of the redwood tree trunk (cylinder) is 8100π ft³.
What is volume of cylinder?
The volume V of a cylinder with radius r is the area of the base B times the height h .
V=Bh or V=πr²h
Circumference of redwood tree trunk = 18π ft
2πr = 18π ( circumference of a circle = 2πr)
r = 9 ft
The redwood tree trunk forms a cylinder.
volume of cylinder = πr²h
r = 9 ft
h = 100 ft
volume = π * 9² * 100 = 8100π ft³
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