The density of an any material/object is given by p=m/V
The volume of a cylinder is V= πr2h
So the density of a cylinder is therefore: p=m/πr2h
Where: m is mass, r is radius and h is the height of the cylinder.
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Since we want to calculate the weight of a cylinder, the formula is W = V*D. Or, Weight = Volume*Density. [πr²h is the formula for volume. Pi [3.14159...] x radius squared x height. Simply substitute if you have all aspects of the formula.]
For a right cylinder, the formula for volume is quite simple. It is pi times the radius of the cylinder squared times the height of the cylinder.
The formula for volume of a cylinder is pi•r2•h
Density = mass / volume
density = mass / volume