In the first race, A beats B by 10 meters. In the second race, A starts 10 meters behind B. This means that A essentially starts at the same point where B started in the first race.
Since A and B are running at the same speeds in both races, we can conclude that A will cover the same distance in the second race as B did in the first race.
Therefore, in the second race, A will cover the initial 10 meters and then cover the same distance as B did in the first race. As a result, A will end up covering a total of 10 meters more than B in the second race.
Hence, the correct option is 4 - A beats B by 1 meter in the second race.