Final answer:
Yes, the fast guy would lap the slow guy by the time the slow guy completes one lap.
Step-by-step explanation:
In this scenario, we have two runners starting at the same time, with one runner being twice as fast as the other. If the slow runner completes one lap, the fast runner would have covered two laps, therefore, lapping the slow runner. This is because the fast runner can cover the same distance in a shorter amount of time.
For example, let's say the slow runner takes 1 minute (60 seconds) to complete one lap. In that same time, the fast runner would have covered twice the distance, which is two laps.
So to answer the question, yes, the fast guy would lap the slow guy by the time the slow guy completes one lap.