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16 Sep 2014, 00:54
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In economy mode, a printer prints twice as fast as it does in optimal quality mode. If, after operating for 20 minutes in optimal quality mode and 40 minutes in economy mode, the printer produces 120 pages, how long would it take for the printer to print 120 pages solely in optimal quality mode?
A. 35 minutes
B. 40 minutes
C. 50 minutes
D. 1 hour 20 minutes
E. 1 hour 40 minutes
A. 35 minutes
B. 40 minutes
C. 50 minutes
D. 1 hour 20 minutes
E. 1 hour 40 minutes
16 Sep 2014, 00:54
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Bookmarks
Official Solution:
In economy mode, a printer prints twice as fast as it does in optimal quality mode. If, after operating for 20 minutes in optimal quality mode and 40 minutes in economy mode, the printer produces 120 pages, how long would it take for the printer to print 120 pages solely in optimal quality mode?
A. 35 minutes
B. 40 minutes
C. 50 minutes
D. 1 hour 20 minutes
E. 1 hour 40 minutes
In optimal mode, the printer prints \(x\) pages per minute.
In economy mode, it prints \(2x\) pages per minute.
Given the equation \(20x + 40*2x = 120\), we find that \(x = 1.2\).
Therefore, to print 120 pages in optimal mode, the printer will require \(\frac{120}{1.2} = 100\) minutes, which is 1 hour and 40 minutes.
Answer: E
In economy mode, a printer prints twice as fast as it does in optimal quality mode. If, after operating for 20 minutes in optimal quality mode and 40 minutes in economy mode, the printer produces 120 pages, how long would it take for the printer to print 120 pages solely in optimal quality mode?
A. 35 minutes
B. 40 minutes
C. 50 minutes
D. 1 hour 20 minutes
E. 1 hour 40 minutes
In optimal mode, the printer prints \(x\) pages per minute.
In economy mode, it prints \(2x\) pages per minute.
Given the equation \(20x + 40*2x = 120\), we find that \(x = 1.2\).
Therefore, to print 120 pages in optimal mode, the printer will require \(\frac{120}{1.2} = 100\) minutes, which is 1 hour and 40 minutes.
Answer: E
19 Oct 2023, 01:20
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I have edited the question and the solution by adding more details to enhance its clarity. I hope it is now easier to understand.
