Well, it could be 10'x35' or it could be many different measurements. You take the length times the width of a room to get the square footage, but if you are painting it, then you will need the lengthxwidthxheight. Most ceiling are 8', but some are much higher. So, you need the three measurements, not just LxW. A wall that is 10' long and 8' high is 80 square feet, for instance. Take each wall and measure it's length, then the height. That would probably be the easiest for you if you want the simpliest method. Good Luck!!!
