Quandaries
and Queries 

Hello, I am trying to figure out the capacity of my dryer. I need to know the size in order to buy a new one. The drum within measures 27” in diameter and 18” deep. I know that I am looking for an answer in cubic feet but am not sure how to determine this. I would appreciate your help. Thank you. Darlene 

Hi Darlene, The shape of the drum in your dryer is a circular cylinder, and the volume of a cylinder is
Since the base of your cylinder is a circle the volume is
where is approximately 3.1416. The drum radius for your dryer is ^{27}/_{2} = 13.5 inches. Since you want the volume in cubic feet I think it is best to change all the measurements to feet before you calculate the volume. The height is 18 inches which is ^{18}/_{12} = 1.5 feet. The radius is ^{13.5}/_{12} = 1.125 feet. Thus the volume is
Penny 

