Henry Ernest Dudeney/Puzzles and Curious Problems/75 - A Question of Transport

by : $75$

 * A Question of Transport
 * Twelve soldiers had to get to a place twenty miles distant with the quickest possible dispatch,
 * and all had to arrive at the same time.
 * They requisitioned the services of a man with a small motor-car.
 * "I can do twenty miles an hour," he said, "but I cannot carry more than four men at a time.
 * At what rate do you walk?"
 * "All of us can do a steady four miles an hour," they replied.
 * "Very well," exclaimed the driver, "then I will go ahead with four men,
 * drop them somewhere on the road to walk,
 * then return and pick up four more (who will then be somewhere on the road),
 * drop them off also, and return for the last four.
 * So all you have to do is to keep walking while you are on your feet, and I will do the rest."


 * As they started at noon, what was the exact time that they all arrived together?