In a 60-minute gym class, 40 girls want to play volleyball, but only 10 can play at a time. For each player to get the same amount of playing time, how many minutes should each person play?
Divide the group of 40 girls by the number of girls who can play at the same time: 40 ÷ 10 = 4. This means 4 groups of girls have to share the 60 minutes or 60 minutes ÷ 4 = 15 minutes. Thus, each girl plays for 15 minutes.