If you take a sheet
of paper and mark it with a
Figure A, you will find that when you roll it into cylindrical form,
the line outside, it will appear as in Figure B.
It will be seen
that the spiral (in one complete
hypotenuse of a right-angled triangle, of which the length and width of
the paper are the other two sides.
In the puzzle given, the lengths of
the two sides of the triangle are 40 ft. (one-fifth of 200 ft.) and 16
ft. 8 in.
hypotenuse is 43 ft. 4 in.
The length of the
garland is therefore five times as long—216 ft. 8
of the puzzle is the fact that with the dimensions given the result is
exactly the sum of the height and the circumference.