Suzy wants to run a mile in 8 minutes. How much time can take each lap if she must do 6 laps?
Is that exactly what the question is, or did you paraphrase it? There seems to be some information missing from the question you posted.
Assuming 6 laps is a mile 8 minutes / 6 laps = 1.333 minutes per lap or 1 minute 20 seconds per lap.