Story: Katie, Dan and Eric meet at the public library. They are planning for their new webpage business. Eric takes 3 five-hour days to make a webpage and Dan takes 5 six-hour days to create a webpage. We asssume the pages took the same amount of work. Katie sets them up to work on a page of the same effort together. They then decide to leave. Right then, the librarian comes over to their desk and tells them they should leave.
Enigma: How long will it take Dan and Eric to complete the third page?