<pre>
A duck is swimming about in a circular pond.  A ravenous fox (who
cannot swim) is roaming the edges of the pond, waiting for the duck to
come close.  The fox can run faster than the duck can swim.  In order
to escape, the duck must swim to the edge of the pond before flying
away.  Assume that the duck can't fly until it has reached the edge of
the pond.

How much faster must the fox run that the duck swims in order to be
always able to catch the duck?

[[RecPuzzlesDuck and Fox Solution]]
</pre>
