###Human: Micah can type 20 words per minute and Isaiah can type 40 words per minute. How many more words can Isaiah type than Micah in an hour?, ### Assistant: There are 60 minutes in an hour.
Micah can type 20 x 60 = 1200 words in an hour.
Isaiah can type 40 x 60 = 2400 words in an hour.
Isaiah can type 2400 - 1200 = 1200 words more than Micah in an hour. 
 So the answer is :  1200