Answers 313- THE FLY AND THE HONEY
The drop of honey is represented by H, the fly by F. The fly clearly has to
go over the edge to the other side. Now, imagine we are dealing with a cylinder
of cardboard. If we cut it we can lay it out flat. If we then extend the line of
the side I inch to B, the line FB will cut the edge at A, which will be the point
at which the fly must go over. The shortest distance is thus the hypotenuse of
a right-angled triangle, whose height is 4 and base 3. This we know is 5, so that
the fly has to go exactly 5 inches.
B3'·- PACKING CIGARETTES
Say the diameter of a cigarette is 2 units and that 8 rows of 20 each, as in
Figure A (that is, 160 cigarettes) exactly fit the box. The inside length of the box