**THE CLOTHES LINE PUZZLE.— solution**

Multiply together, and also add together, the heights of the two poles and
divide one result by the other. That is, if the two heights are *a*
and *b* respectively, then
^{ab}/_{(a + b)} will give the
height of the intersection. In the particular case of our puzzle, the
intersection was therefore 2 ft. 11 in. from the ground. The distance that the
poles are apart does not affect the answer. The reader who may have imagined
that this was an accidental omission will perhaps be interested in discovering
the reason why the distance between the poles may be ignored.

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