Henry Ernest Dudeney/Modern Puzzles/44 - Find the Distance

by : $44$

 * Find the Distance
 * A man named Jones set out to walk from $A$ to $B$,
 * and on the road he met his friend Kenward, $10$ miles from $A$, who had left $B$ at exactly the same time.
 * Jones executed his commission at $B$ and, without delay, set out on his return journey,
 * while Kenward as promptly returned from $A$ to $B$.
 * They met $12$ miles from $B$.


 * Of course, each walked at a uniform rate throughout.


 * Now, how far is $A$ from $B$?


 * I will show the reader a simple rule by which the distance may be found by anyone in a few seconds without the use of a pencil.
 * In fact, it is quite absurdly easy -- when you know how to do it.