let's find the surface area of our cylinder it's deffinitely going to have both of these areas here. so it's going to have the 16 pi cm squared twice this is 16 pi, this is 16 pi square cm. so it's going to have two times 16 pi. cm squared. i'll keep the units still. so that covers the top and the bottom of our soda can. and now we have to figure out the surface area of this thing that goes around and the way I imagine it is imagine if you were trying to wrap this thing with wrapping paper so let me just draw