Three runners, Dirk, Edith, and Foley all start at the same time for a $24$ km race, and each of them runs at a constant speed. When Dirk finishes the race, Edith is $9$ km behind, and Foley is $12$ km behind. When Edith finishes the race, how far behind is Foley, in km?
MathBot Answer:
MathBot is working on a solution to your problem.
