5km in 30minutes, i see that as alright i mean your running 1km every 6minutes. That also means it would take you just over 15 minutes to run 2.4km, which is over the time limit for the 2.4km run and that is the minimum time you should be practicing for to make sure that you can do it when you get to BmQ. As george stated, do a search for previous threads that cover this.