1. The problem statement, all variables and given/known data I know that a single integral can be used to find the area under a y = f(x) curve, but above the x axis. Correct me if this example of a double integral is invalid: If I hold a piece of paper in mid air and it droops, the double integral will give me the volume of the object bounded on the bottom by the ground (flat and even) and on top by the paper (smooth but sloping downwards - like a surface). What then, does the triple integral tell me? Is there a real-world example? Thank you. I've seen that other people have asked the same question in this forum, but I still couldn't understand the reasoning even after reading them. 2. Relevant equations n/a 3. The attempt at a solution The double and triple integrals both give volume. So is there a difference? What is a real world example of a triple integral graph?