Barbara Blackburn can type 212 words per minute. Due to Carpal tunnel syndrome, Barbara cannot use her left hand for a while so her typing speed is now 40 words less per minute. If she is supposed to type a document with 3440 words, how many minutes will it take her to finish typing the document? Give me reasons, before answering the question
Due to carpal tunnel syndrome, Barbara can only type 212 - 40 = 172 words per minute. So, she will be able to finish typing the document in 3440 / 172 = 20 minutes. So the final answer is 20.