# Radius of a wire is 2.5mm and its lenfth is 50.0cm.If it's Mass is measured to be 25gm then find its densite up to correct significant figures?

##### 1 Answer

Jun 18, 2018

#### Explanation:

Density

The volume of a solid cylinder is its length*the area of its cross-section. The cross-section of the wire is a circle, so the area of the cross-section

Therefore the volume of this wire is

And the density is

I hope this helps,

Steve