1. A student is trying to see how quickly they can run 5.0 km on a standard 400 m running track.

They reason that, if they know how fast they can run one lap, they can assume they will run at the same speed for 5.0 km, and can calculate their predicted time.

They, correctly, reason that they will not be able to maintain their initial pace throughout the whole 5.0 km, so they decide to time lap 5.

The diagram shows the reading on the stopwatch at the beginning and the end of lap 5.

Calculate how long it should take the student to run 5.0 km.