Given:
The radius of the cylinder is 8 inches.
The height of the cylinder is 10 inches.
We need to determine the volume of the cylinder.
Volume of the cylinder:
The volume of the cylinder can be determined using the formula,

where r is the radius and h is the height.
Substituting
and
in the above formula, we get;

Simplifying, we get;

Multiplying, we get;

Thus, the volume of the cylinder is 640π in³
Hence, Option C is the correct answer.