Finding the density of a 1938 nickel coin

[n77ler]

Homework Statement

A 1938-nickel has a diameter of 2.11×10-2 m, a thickness of 1.95×10-3 m, and weighs 4.94×10-2 N.
What is its density?

Homework Equations

density=m/v ? or density =w/vg

The Attempt at a Solution

cant find the volume, I feel like I should drop out of university it's the simplest problem and I'm completely stuck.

v= pir^2 ?

 

[Kurdt]

The nickel is circular so the area of the circle is $A=\pi r^2$, which you will multiply by the thickness to get the volume.