I NEED to know the cost of a certain amount of cement, if i am building a patio that needs to be about 25ft.9in.(length)x26ft.(width) how much would it cost, it should be about 2 inches thick. It would be a huge help if you could find this out for me, please get back to me as fast as possible.
Guitar George has it right. You need concrete (some people call it cement but that is technically not correct) It needs to be at least 3 1/2 inches, maybe 4 $100 cubic yard for concrete delivered. Does not include labor to place and finish. You will also need formwork and rebar.
length x width x depth / 27 = cubic yards 26 x 26 x .33 ( 4 as a decimal ) = 233/27= 31.86 cu yards order 3 truck loads ask your finisher how much more....
First of all, you want concrete, not cement. Second, two inches of concrete isn't thick enough, it will be cracking to pieces within a year. Better to make your forms out of 2x4s, giving you a 3 1/2 thick slab. Use wire mesh also. That being said, a two inch slab will take 4 cu yd of concrete. If you go the 3 1/2 route, you will need 6 1/2 cu yd. The cost will vary depending on source, location, delivery, etc. but roughly you can figure $100 / cu yd.