SOLUTION: Hi
Andrew finished typing 8 similar sets of notes in 3 hours. If his typing speed increased to 60 words per minute, he would have finished typing the same sets of notes 2 hours f
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Question 1197414: Hi
Andrew finished typing 8 similar sets of notes in 3 hours. If his typing speed increased to 60 words per minute, he would have finished typing the same sets of notes 2 hours faster.
What was his original typing speed.
Thanks
Found 2 solutions by josgarithmetic, greenestamps:
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
Unknown words per minute, r, for the first part.
Eight jobs in 3 hours at unknown rate, r.
Second part, r+60 words per minute, but 1 hour ("2 hours faster");
Same number of jobs.
-
------------- original speed.....
--
Not "by 60", but as "to 60" words per minute:
-------------original speed, words per minute
Answer by greenestamps(13198) (Show Source): You can put this solution on YOUR website!
The solution from tutor @josgarithmetic has the typing speed increased BY 60 words per minute; the statement of the problem says the typing speed increased TO 60 words per minute.
The job was done in 3 hours; at a typing speed of 60 wpm it would have been completed 2 hours faster -- i.e., in 1 hour.
The time required to complete the job is 1/3 of what it was; that means the typing speed was 3 times what it was before.
If 60 wpm is 3 times the original speed, then the original typing speed was 20 wpm.
ANSWER: 20 words per minute
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