Final answer:
The man who runs 100 m in 20 seconds is faster.
Step-by-step explanation:
To determine who is faster, we need to compare the speeds of the two runners. The man who runs 30 min 10 seconds covers a distance of 0 meters (since he is not moving), while the man who runs 100 m in 20 seconds covers a distance of 100 meters. Therefore, the man who runs 100 m in 20 seconds is faster.