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Answer :
Volume of wood in the entire stand = Volume of the cuboid - 4 × Volume of a depression (i.e., cone)
\( = \ l b h \ - \ 4 \ × \ \frac{1}{3} \pi r^2 h \)
\( = \ 15 \ × \ 10 \ × \ 3.5 \ - \ 4 \ × \ \frac{1}{3} \ × \ \frac{22}{7} \ × \ 0.5 \ × \ 0.5 \ × \ 1.4 \)
\( = \ 525 \ - \ 1.47 \ = \ 523.53 \) cm3