You mean to tell me that given the information above, you can't figure out the approximate weight of concrete in each tower?Sources from before 9/11 specify 200,000 tons of steel and 425,000 cubic yards of concrete.
It should be obvious, even to you, that the steel had to support its own weight and the concrete, plus glass, plus plumbing with the water and many other things. But the NIST says there were two densities of concrete, 150 lb/cu ft and 110 lb/cu ft. So knowing the cubic yards does not tell us the weight.
Let's see if we can't help you.
What was the weight of the concrete used for the slabs outside the core? How many cubic feet of concrete was there for each of those floors?