Trace: • bookworm
wiki:donuts:springsummer2014:bookworm
Answer
4 mm.
If the books are on the shelf with the spine out, then the front cover of Vol. 1 is against the back cover of Vol. 2 so the worm only eats through 2 covers and no pages.
wiki/donuts/springsummer2014/bookworm.txt · Last modified: 2014/04/30 16:24 by jmb438