Puzzle Answers

OK so you have found the answers to the TRAFFIC CONGESTION puzzle. Well done!

Suppose that Berts lives "x" miles from the tower and the time he allowed for the journey was "y" minutes.

x miles at 20 mph takes hours which is 3x minutes.

x miles at 35 mph takes hours or minutes

We are told that the difference in time between the two journeys was 15 minutes.

Hence:-

Thus Bert lives 11 2/3 miles from the tower.