(Current info as of 2014-05-26 using Android 4.4.2 and Scribd version 3.5.1)
Documents saved offline using the Scribd Android app are stored in
/data/media/0/document_cache/<DOC ID>
For instance, if the file you are trying to access is:
http://www.scribd.com/doc/20628549/Linux-Commands
The location would be:
/data/media/0/document_cache/20628549/
The actual file would be:
/data/media/0/document_cache/20628549/content
This file has no extension, but if you copy it and rename it to a .pdf file you can access it from other PDF viewers or export it to Google Drive/Dropbox
Documents saved offline using the Scribd Android app are stored in
/data/media/0/document_cache/<DOC ID>
For instance, if the file you are trying to access is:
http://www.scribd.com/doc/20628549/Linux-Commands
The location would be:
/data/media/0/document_cache/20628549/
The actual file would be:
/data/media/0/document_cache/20628549/content
This file has no extension, but if you copy it and rename it to a .pdf file you can access it from other PDF viewers or export it to Google Drive/Dropbox