i do not understand what to do for this problem

Question

Consider the roll of quarters. The diameter of a quarter is 24.26 mm. Each quarter is 1.75 mm thick (hint: height of each quarter). What is the approximate volume of the roll of quarters? Use 3.14 for pi and round your answer to the nearest tenth.

Answer 1

The shape of a roll of quarters is a cylinder, so you will be finding the volume of a cylinder.

PI * R^2 * H

where R = radius and H = height

You are given the diameter, so you can compute R (the radius) as half the diameter.

You are given the height (thickness) of each quarter. To determine the height (H) of the roll you will need to multiply the number of quarters in a roll (which you have not specified but is generally 40) * the height of each quarter.

You then plug R and H into the above equation to compute the volume.