Along the running track, 12 flags are placed at equal distances from each other. The athlete starts at the first flag and runs at a constant speed. Already after 12 seconds, the athlete was at the 4th flag. How long will it take him to run the entire track?
Recall problem 4.

## Solution

Between 12 flags, there are 11 "distances." Between 4 flags, there are 3 "distances." It takes 4 seconds to cover one "distance." Therefore, it will take a total of 44 seconds.

## Answer

It takes 44 seconds.