On Friday I posted this puzzle….
Yesterday I decided to walk from my house to my office. The journey is 5 miles long and I walked at a steady 2 miles per hour. When I arrived at the office 40 buses had overtaken me and 50 buses had come from the direction of my office. What was the average speed of the buses?
If you have not tried to solve it, have a go now. For everyone else the answer is after the break…
The answer is 18 miles per hour – but can anyone explain why?
I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.