The circumference of the circular face is pi x diameter = 31.4160.
Volume uses pi x r^2 x height. A 1% increase in diameter raises volume by about 2%, since radius appears squared.
Total surface area covers the curved side and both circular bases: 471.2396.
Next stepUse the diameter to size pipes, tanks, containers, or cylindrical structural members. For hollow cylinders, you need both inner and outer diameters.