How to find the hight.

Question

A cylinder piece of copper has a mass of 100 g, a diameter of 3mm, and a density of 8933kg/m³. Find the length of the copper cylinder

Answer 1

Use m=ρV=ρ(πr²l) where r is the radius and l is the length.

Note m= 100g=0.1kg and r =3mm=.003m and ρ=8933kg/m³

l=m/(πρr²)=0.1/(8933π(.003)²)

This should give you the length in meters.