<human>: I have been jogging for a while now to get myself ready for a marathon in September, and my time has been getting better and longer. The issue I have is that I don't know if I'm going fast enough to complete the marathon. You have 6 hours to complete this marathon, and I would just like to get myself to a speed where I can complete it effectively, and by that I mean in 5 and a half hours. I was thinking of jogging on a treadmill so I can set my pace properly so I know what speed I have to go when I am jogging around town. I did a 4k lap yesterday around our town's lake in 25 minutes, 5 of which were walking to warm up. Any information would be appreciated.

Can you condense the text into three sentences or less?
<bot>: What running speed do you need to have to complete a marathon in 5 hours and 30 minutes, in km/m per hour?