Henry Ernest Dudeney/Modern Puzzles/162 - The Fly and the Honey

Modern Puzzles by Henry Ernest Dudeney: $162$

The Fly and the Honey

I have a cylindrical cup four inches high and six inches in circumference.

On the inside of the vessel, one inch from the top, is a drop of honey,

and on the opposite side of the vessel, one inch from the bottom on the outside, is a fly.

Can you tell exactly how far the fly must walk to reach the honey?

Sources

• 1926: Henry Ernest Dudeney: Modern Puzzles ... (previous) ... (next): Unicursal and Route Problems: $162$. -- The Fly and the Honey
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Geometrical Problems: Solid Geometry Puzzles: $325$. The Fly and the Honey