Firstly we need to find out how many 5-meters-sections can fit in 2400 meters (2.4 km). To do that we just divide:
2400 ÷ 5 = 480
Now we just multiply the result by the amount of time Timothy needs to beat it (one second in this case):
480 * 1 = 480
So it takes 480 seconds (which is as much as 8 minutes) for Timothy to run 2.4 km.
