How to do problem no. 111 from Math Counts School Handbook 2011 2012(remkae)

Team: 
The Lifes
Topic: Solid Geometry
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This video shows how to do problem no. 65 from Math Counts School Handbook 2011 2012.

Common Core Standards: 8.G.9
Problem #: 
111 (2011-2012)
Problem Difficulty Level: 5 [?]