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# A certain business printer can print 40 characters per

Author Message
VP
Joined: 09 Jul 2007
Posts: 1100
Location: London

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23 Aug 2007, 17:33
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A certain business printer can print 40 characters per second, which is 4 times as fast as an average printer. If an average printer can print 5 times as fast as an electric typewriter, how many characters per minute can an electric typewriter print?

I got 2 but OA says 120

what do you think?
Director
Joined: 03 May 2007
Posts: 872
Schools: University of Chicago, Wharton School

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23 Aug 2007, 18:38
Ravshonbek wrote:
A certain business printer can print 40 characters per second, which is 4 times as fast as an average printer. If an average printer can print 5 times as fast as an electric typewriter, how many characters per minute can an electric typewriter print?

I got 2 but OA says 120

what do you think?

per second = 2
per minuet = 60x2 = 120
Manager
Joined: 03 Sep 2006
Posts: 233

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23 Aug 2007, 18:49
OA is right =)

B = 40/s
Av = 40/4 = 10/s
E = 10/5 = 2/s

2/s *60s = 120/min
VP
Joined: 09 Jul 2007
Posts: 1100
Location: London

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24 Aug 2007, 14:34
Ravshonbek wrote:
A certain business printer can print 40 characters per second, which is 4 times as fast as an average printer. If an average printer can print 5 times as fast as an electric typewriter, how many characters per minute can an electric typewriter print?

I got 2 but OA says 120

what do you think?

good, thanks a bit attention would be of help
Re: printers   [#permalink] 24 Aug 2007, 14:34
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