How to solve the volume and density?

Question

Dimensions of cylinder.

length: 76.25mm

diameter: 12.76mm

Mass of cylinder: 74.9650g

How to calculate the volume of the solid cylinder (cm^3) ?

and density (g/cm^3)?

Answer 1

1mm=0.1cm

Length = 7.625cm

Diameter = 1.276 cm

Cylinder: V = π R²L

Diameter = 2R

V= π(0.638)²(7.625)

V= .0975 cm³

Density = mass / volume

D= 74.9650g / 0.975 cm³

D = 768.8 g/cm³

Answer 2

Volume = πr²h ( r = 12.76 / 2, h = 76.25) . This gives volume in mm³, so you have to divide it by 1000 to get volume in cm³

To find density, divide the mass by your volume in cm³

Mike