Other contributors have said "How many page are in The Two Towers?" is the same question as "How many pages are in The Two Towers?" If you believe that these are not asking the same thing and should be answered differently, click here
The entire series comes to roughly 3712 pages, give or take a few based on which printing and whether hardback or softcover. This could be validated, but that's what I've found and others have...
The unabridged version of A Tale of Two Cities is 293 pages long. Another version is 372 pages long. In another, 443 pages. Of course, this depends on the physical size of the page, font and spacing...