yolando and yoko ran in a 100 yard dash. when yolanda crossed the finish line in 15 seconds, yoko was 10 yards behind her.

yolando and yoko ran in a 100 yard dash. when yolanda crossed the finish line in 15 seconds, yoko was 10 yards behind her. The girls then repeated the race, with yolanda starting 10 yards behind the starting line. If each girl ran at same rate as before, who won the race? By how many yards?