Calculate the pressure in a 1,6 km tube with 64 degrees angle

Please consider my excellent rating. If I accept a solution I ALWAYS give 10 star ratings to workers. I am not good in physics and need you to calculate the following: There are two pipes that are 1,6 km long. They lay right next to eachother and form a circuit. They lay in a grade of 64 degrees (I believe that the top point is something like 333 meters above the lower point, please verify). The pipe is square (15 x 15 mm) filled with a fluid of density 0.89 g/cm3. There will be additional "weight" put on the fluid throughout the pipe totalling 0,12 tonns. This "weight" is evenly distributed throughout the pipe. Understand this weight as pieces of heavy material (do not consider the fluid that could be in the place of this material as it is negletable). My question is: How much pressure (measured in bars) will there be a the bottom of this circuit? I need this to know the specifications of the pipes that needs to be bought. Please provide this calculation in Excel (or OpenOffice) using comments to explain EVERY STEP with urls to wikipedia aritlces describing the formulas you are using. The Excel sheet needs to be easy to read. If you are making any assumptions, please describe them to me. If you simply send me your solution (with at least four decimals) in the bid (and this proves to be correct), I will pay 5$ (unless I get more than 20 of them while I am asleep :)) ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's Worker Legal Agreement). ## Platform Excel/OpenOffice