GAUSS7 2004 Problem 16

What is the maximum number of rectangular wooden blocks with dimensions 20\:cm\times30\:cm\times40\:cm that could fit into a rectangular box with inner dimensions 40\:cm\times60\:cm\times80\:cm?

Answer Choices
A. 2
B. 4
C. 10
D. 8
E. 6

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