Given are two fence designs. Both are available for arbitrary value of x. Now the density of a fence is defined as the total length of the wire per square meter. It measures how expensive the fence is. The pebble coarseness of a fence is the radius of the longest circle you can find inside the fence plane whose interior doesn't intersect the wire.
|If you look at the two designs, both for pebble diameter 10cm, which one has the smaller density?|
Erich Prisner, August 2003