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) 600cth
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aj5105
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x = speed of average printer
y = speed of electric typewriter
Business printer can type 40 characters per second = 4 (x)
x = 10
x = 5 (y)
y = 2 (this is per second)
For a minute = 2 * 60 = 120
Choose (D)
y = speed of electric typewriter
Business printer can type 40 characters per second = 4 (x)
x = 10
x = 5 (y)
y = 2 (this is per second)
For a minute = 2 * 60 = 120
Choose (D)
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Jeff@TargetTestPrep
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Since the rate of a business printer is 40 characters per second, then the rate of an average printer is 10 characters per second, and the rate of an electric typewriter is 2 characters per second. Therefore, in one minute, the electric typewriter can print 2 x 60 = 120 characters.ramonsa 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?
(A) 2
(B) 32
(C) 50
(D) 120
(E) 600cth
Answer: D
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Brent@GMATPrepNow
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A certain business printer can print 40 characters per second...ramonsa 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?
(A) 2
(B) 32
(C) 50
(D) 120
(E) 600cth
40 x 60 = 2400
So, the business printer can print 2400 characters PER MINUTE
..., which is 4 times as fast as an average printer.
2400/4 = 600
So, the average printer can print 600 characters PER MINUTE
If an average printer can print 5 times as fast as an electric typewriter...
500/5 = 120
So, the electric typewriter can print 120 characters PER MINUTE
... how many characters per minute can an electric typewriter print?
Answer: 120 (D)
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Brent
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