The World Series for Major League Baseball is going to be played on a grass field this year. The league would like it to be mowed fresh on the morning of the game and be done by noon so that the players can warm up on it. Normally, the two lawn maintenance people, Geneva and Miles, work together and can mow the lawn in 2 hours (120 minutes). If they mowed it individually, Miles would take 30 minutes longer than Geneva.