The Napkin Ring Problem ·
Same Height, Same Volume
un
seel
.com · drill a hole through any sphere · the leftover ring's volume depends only on its height
Ring height
h = 1.5
Volume
πh³⁄6
Phase
POISED
Huge sphere → wide ring
Tiny sphere → narrow ring
Slice: equal area at every level
Drill bit (bores the hole)
▶ Play
←
→
🔇 Unmute
Reset
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seel
.com · The Napkin Ring Problem