??? what type of question is that??
You'd first have to find out what percentage of people would be 30 out of 100%
4500 meters. You find this by adding 1/3 and 2/5 which equals 11/15. This means that the remaining 4/15 is 1200 meters long. Divide 1200 by 4 in order to find the distance per 1/15 and you get 300. Multiply 300 with 15 to get the total distance of the race.
You have to give the problem and not just the options for me to solve
