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# Working at a constant rate, a copy machine makes 20 copies of a one-pa

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Working at a constant rate, a copy machine makes 20 copies of a one-pa  [#permalink]

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29 Jul 2018, 02:40
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Difficulty:

5% (low)

Question Stats:

97% (00:51) correct 3% (00:52) wrong based on 600 sessions

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Working at a constant rate, a copy machine makes 20 copies of a one-page document per minute. If the machine works at this constant rate, how many hours does it take to make 4,800 copies of a one-page document?

A. 4
B. 5
C. 6
D. 7
E. 8

NEW question from GMAT® Quantitative Review 2019

(PS03439)

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Re: Working at a constant rate, a copy machine makes 20 copies of a one-pa  [#permalink]

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29 Jul 2018, 02:53
1
Bunuel wrote:
Working at a constant rate, a copy machine makes 20 copies of a one-page document per minute. If the machine works at this constant rate, how many hours does it take to make 4,800 copies of a one-page document?

20 Copies = 1 Min
1 Copy = 1 / 20 Min

Therefore,
4800 Copies = 4800 / 20 Min
4800 Copies = 240 Min = 240 / 60 Hrs = 4 Hrs

Hence, A.
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Re: Working at a constant rate, a copy machine makes 20 copies of a one-pa  [#permalink]

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03 Aug 2018, 15:06
Bunuel wrote:
Working at a constant rate, a copy machine makes 20 copies of a one-page document per minute. If the machine works at this constant rate, how many hours does it take to make 4,800 copies of a one-page document?

A. 4
B. 5
C. 6
D. 7
E. 8

If the copy machine can make 20 copies of a one-page document per minute, then it can make 20 x 60 = 1,200 copies per hour. So it will take 4,800/1,200 = 4 hours to make 4,800 copies.

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Re: Working at a constant rate, a copy machine makes 20 copies of a one-pa  [#permalink]

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04 Aug 2018, 08:07
Bunuel wrote:
Working at a constant rate, a copy machine makes 20 copies of a one-page document per minute. If the machine works at this constant rate, how many hours does it take to make 4,800 copies of a one-page document?

A. 4
B. 5
C. 6
D. 7
E. 8

NEW question from GMAT® Quantitative Review 2019

(PS03439)

The efficiency of the machine per hour is $$20*60 = 1200$$

So, To produce $$4800$$ copies time required is $$\frac{4800}{1200} = 4$$ Hours, Answer must be (A)
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Joined: 10 Jul 2018
Posts: 6
Re: Working at a constant rate, a copy machine makes 20 copies of a one-pa  [#permalink]

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07 Aug 2018, 08:56
1
Bunuel wrote:
Working at a constant rate, a copy machine makes 20 copies of a one-page document per minute. If the machine works at this constant rate, how many hours does it take to make 4,800 copies of a one-page document?

A. 4
B. 5
C. 6
D. 7
E. 8

NEW question from GMAT® Quantitative Review 2019

(PS03439)

------------------------------------------------------------------------------------------------------------------------------------------------

20 copies in 60 seconconds

20/60=3 seconds per 1 copy
4,800 copies * 3seconds= 14400 seconds
14400/per 60=240 minutes
240 minutes/60=4 hours
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Working at a constant rate, a copy machine makes 20 copies of a one-pa  [#permalink]

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02 Oct 2018, 06:42
1
Copy machine makes 20 copies=1 min
So, 4800 copies=4800/20= 240 mins

240 mins=240/60 = 4 hrs

(A)
Working at a constant rate, a copy machine makes 20 copies of a one-pa   [#permalink] 02 Oct 2018, 06:42
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