I assume you mean 50,000+ words and not pages.
If so, it depends on your margins, your font type, your font size and whether or not you are single- or double-spacing.
Assuming you are using 1-inch margins, double-spacing, and using either Times New Roman or Courier 12-point type, it should be approximately 200 pages.
But, if you did mean 50,000+ pages, then it is a trick question and the answer is 50,000+ pages comes to 50,000+ pages.
