The document shows that if two objects travel for the same time, their speed ratio will equal their distance ratio. This concept is then applied to a word problem about two runners, Alex and Bob, running on a 400m track. Alex's speed is 190m/min and Bob's is 25m/min slower. The question asks how many complete rounds Alex had run when he was 300m farther than Bob. The solution uses the concept that speed ratio equals distance ratio to set up and solve equations to determine that Alex had run 5 complete rounds.