human
At school today, Charlize was 20 minutes late. Four of her classmates were each ten minutes late than she was. What's the total time for which the five students were late?
assistant
How many minutes late were each of her friends? ** If Charlize was 20 minutes late, each of her friends was 20+10 = <<20+10=30>>30 minutes late.
How many minutes were each of her friends late? ** The total time for which Charlize's friends were late was 4*30= <<4*30=120>>120 minutes.
How many minutes were the three friends late? ** Together with Charlize, the three friends were 120+20 = <<120+20=140>>140 minutes late.
#### 140