Four runners competed in a 10 kilometer relay race. Each runner ran the same distance. What was the distance?

Ok i think they ran their own race so here goes nothing. Four runners so you need four in your problem so 4x now. Lets add the ten four ten kilometers i each race. So you final awnsere is 4x10=40 kilometers

This question doesn't make sense. are you asking how far did all 4 runners run together?