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16 Sep 2014, 01:21
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In normal mode, 20 identical printers can produce 100 pages in 3 minutes. However, in economy mode, these printers can produce 20% more pages in the same time. How many printers are needed to produce 180 pages in 3 minutes when using economy mode?
A. 25
B. 28
C. 29
D. 30
E. 32
A. 25
B. 28
C. 29
D. 30
E. 32
16 Sep 2014, 01:21
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Official Solution:
In normal mode, 20 identical printers can produce 100 pages in 3 minutes. However, in economy mode, these printers can produce 20% more pages in the same time. How many printers are needed to produce 180 pages in 3 minutes when using economy mode?
A. 25
B. 28
C. 29
D. 30
E. 32
In normal printing mode, a single printer can print \(\frac{100}{20}=5\) pages in 3 minutes.
In economy mode, this capacity is enhanced, and one printer can print \(5*1.2 = 6\) pages in the same 3 minutes.
Thus, to print 180 pages in 3 minutes in economy mode, you'd need \(\frac{180}{6}=30\) printers.
Answer: D
In normal mode, 20 identical printers can produce 100 pages in 3 minutes. However, in economy mode, these printers can produce 20% more pages in the same time. How many printers are needed to produce 180 pages in 3 minutes when using economy mode?
A. 25
B. 28
C. 29
D. 30
E. 32
In normal printing mode, a single printer can print \(\frac{100}{20}=5\) pages in 3 minutes.
In economy mode, this capacity is enhanced, and one printer can print \(5*1.2 = 6\) pages in the same 3 minutes.
Thus, to print 180 pages in 3 minutes in economy mode, you'd need \(\frac{180}{6}=30\) printers.
Answer: D
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Schools: LBS '25 ISB '25 Manchester'26 Stern '26 Tuck '26 INSEAD Aug'24 intake Yale '26 Kellogg '26 Wharton '26
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25 Aug 2019, 03:05
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I think this is a high-quality question and I agree with explanation. Why was I not able to access this answer explanation on the quiz mode itself?
