Question

The diameter of a penny is 19.05 mm and the thickness is 1.52 mm what is the approximate volume of the role of Penny to the nearest 10th

Answer 1

The volume of a cylinder is the area of the base circle times the height.

The area of a circle is
`\pi r^2`. Since the diameter is 19.05, the radius will be half that diameter:

`r=(d)/(2)=(19.05)/(2)=9.525`

So, the base area is

`A=\pi(9.525)^2`

Multiply this by the thickness and you'll get the volume.