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A certain business printer can print 40 characters per

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A certain business printer can print 40 characters per [#permalink] New post 27 Jun 2007, 10:30
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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?

(A) 2
(B) 32
(C) 50
(D) 120
(E) 600
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 [#permalink] New post 27 Jun 2007, 10:51
Answer - D) 120

average printer = 40/4 = 10 char per second = 5 * (x) x = electric typewriter char per sec

x = 2 char per second from above equation

Since the question is asking speed of electric typewriter in char per minute, answer will be 120 char per minute
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 [#permalink] New post 27 Jun 2007, 10:51
D

business printer----- 40/sec
average printer----- 40/4=10/sec
elctric type---------- 10/5=2/sec

so in 1 min =60*2/sec=120 characters
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 [#permalink] New post 27 Jun 2007, 13:50
B=40p/s = 2400 p/m

B=4A
A=5E

A=600p/m
E=120p/m

D is the answer?
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 [#permalink] New post 27 Jun 2007, 15:41
40 sec.
10 sec.
type writer = 2 words per sec
= 160 per min.
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 [#permalink] New post 27 Jun 2007, 22:29
asaf wrote:
40 sec.
10 sec.
type writer = 2 words per sec
= 160 per min.


You mean 120 :wink:
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Trying hard to conquer Quant.

  [#permalink] 27 Jun 2007, 22:29
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