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For 5 hours, a photocopier copied at a constant rate of 2 [#permalink]
10 May 2016, 07:56
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Question Stats:
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For 5 hours, a photocopier copied at a constant rate of 2 pages every 3 seconds.
Quantity A 
Quantity B 
The number of pages the photocopier copied in 5 hours 
12,000 
A)The quantity in Column A is greater. B)The quantity in Column B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given. Practice Questions Question: 7 Page: 63
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Re: For 5 hours, a photocopier copied at a constant rate of 2 [#permalink]
10 May 2016, 07:57
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ExplanationQuantity A, is the number of pages the photocopier copied in the 5 hours. Copying at the rate of 2 pages every 3 seconds is the same as copying at a rate of 40 pages every 60 seconds, or 40 pages per minute. This rate is the same as copying 2,400 pages every hour, or 12,000 pages in 5 hours. Quantity A is equal to 12,000 and Quantity B is 12,000, the correct answer is Choice C.
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Re: For 5 hours, a photocopier copied at a constant rate of 2 [#permalink]
12 Jun 2019, 07:19
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sandy wrote: For 5 hours, a photocopier copied at a constant rate of 2 pages every 3 seconds.
Quantity A 
Quantity B 
The number of pages the photocopier copied in 5 hours 
12,000 
We can apply some number sense here GIVEN: The photocopier can copy 2 pages in 3 seconds This means the photocopier can copy 40 pages in 60 seconds [if we multiply the operating time by 20, the output is multiplied by 20]In other words, the photocopier can copy 40 pages in 1 MINUTE [since 60 seconds = 1 minute]This means the photocopier can copy 2400 pages in 60 minutes [if we multiply the operating time by 60, the output is multiplied by 60]In other words, the photocopier can copy 2,400 pages in 1 HOUR [since 60 minutes = 1 hour]This means the photocopier can copy 12,000 pages in 5 hours [if we multiply the operating time by 5, the output is multiplied by 5]We get: QUANTITY A: 12,000QUANTITY B: 12,000 Answer: C Cheers, Brent
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Re: For 5 hours, a photocopier copied at a constant rate of 2 [#permalink]
06 Jun 2020, 04:44
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Since the question gave time with seconds, we have to convert to seconds. 5 Hours have total of 18000 seconds, (3600*5) Quantity A is saying the total printed pages in 5 hours. 2/3 = x/ 18000. x= 12000 Quantity B is 12000
the answer is C



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Re: For 5 hours, a photocopier copied at a constant rate of 2 [#permalink]
06 Jun 2020, 12:20
in 5 hours there are 60*5 = 300 mins in 300 mins there are 300*60 = 18000 secs Now, (high school method of cross multiplication) SecsPgs 3 2 18000x The relationship is directly proportional as the more the time, the more the pages will be copied. so, 3x=2*18000 x=12000 that is also the quantity B so option C is correct
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Re: For 5 hours, a photocopier copied at a constant rate of 2
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06 Jun 2020, 12:20





