It would take Lily 255 words / 15 wpm = <<255/15=17>>17 minutes to type without taking a break.

Since Lily takes a break after 10 minutes of typing she takes 17 minutes + 2 minutes = 19 minutes

# Answer

19
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Lily types 15 words a minute and takes a 2-minute break every 10 minutes. How long does it take for Lily to type 255 words?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
19
Lily types 15 words a minute and takes a 2-minute break every 10 minutes. How long does it take for Lily to type 255 words?
train