The volume of a quarter is 808.53 mm3. A quarter is a cylinder with a diameter of 24.26 mm and a thickness, or height, of 1.75 mm. The volume of a cylinder is found by taking the radius of the cylinder squared times the height of the cylinder times pi.
The volume of a quarter is found by taking the diameter and dividing by 2 to get the radius, which equals 12.13 mm. This value is then squared to get 147.14 mm2. After that, the 147.14 is multiplied by the height and 3.14 as the approximation of pi to get 808.53.