Rowing to Shore and Then Running Away

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is in a rowboat in the center of a circular lake (black dot).
has to escape from
(red dot), who knows
must come ashore. Although
can run faster than
once on land,
runs
times faster than
can row, where
. Is there a strategy for
to escape?
Contributed by: Izidor Hafner (January 2014)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Richard F. Guy shows that can always escape when
runs at most 4.6 times as fast as
rows (solution 2).
Reference
[1] M. Gardner, The Colossal Book of Short Puzzles and Problems, New York: W. W. Norton, 2006 pp. 237, 256–257.
Permanent Citation