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The Volume formula of a Cylinder is
V =

r²h
(r = radius, h = height)
The radius given is 8 and the height is 4, We can plug in the known values
V =

(8)²(4)
=

256
=
256
units³ (You can leave the answer in this form)
≈
804.2 units³ (approximately)
Units
³ because it is a volume (3D shape)