7.5 seconds. According to the inquiry of "National Students' Physical Health Standard", the perfect score standard for college girls' 50-meter running is 7.5 seconds. The passing criteria for college students' 50-meter running are excellent with a total score of 90 or more, good with a total score of 80 to 89, passing with a total score of 60 to 79, and failing with a total score of 60 or less.