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On Monday morning a certain machine ran continuously at a

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On Monday morning a certain machine ran continuously at a [#permalink] New post 30 Dec 2007, 13:50
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On Monday morning a certain machine ran continuously at a uniform rate to fill a production order. At what time did it completely fill the order that morning?

(1) The machine began filling the order at 9:30 a.m.
(2) The machine had filled 1/2 of the order by 10:30 a.m. and 5/6 of the order by 11:10 a.m.
[Reveal] Spoiler: OA

Last edited by Bunuel on 08 Nov 2012, 01:52, edited 1 time in total.
Renamed the topic, edited the question and moved to DS forum.
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 [#permalink] New post 30 Dec 2007, 14:02
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B!

1) Insuff. Only tells us when the work started.

2) Suff. Gives us the rate of work and how much of the job completed in x amount of time.

5/6 job - 1/2 job = 1/3 of the job was filled between 10:30 11:10 AM. So the rate is 1/120 (1/3 / 40 mins = 1/120). So.... 1 job is finished in 120 minutes or 2 hours.

OA???
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 [#permalink] New post 30 Dec 2007, 14:13
jimmyjamesdonkey wrote:
B!

1) Insuff. Only tells us when the work started.

2) Suff. Gives us the rate of work and how much of the job completed in x amount of time.

5/6 job - 1/2 job = 1/3 of the job was filled between 10:30 11:10 AM. So the rate is 1/120 (1/3 / 40 mins = 1/120). So.... 1 job is finished in 120 minutes or 2 hours.

OA???


I am sure the OA is B. i remember it from OG Quant book
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 [#permalink] New post 30 Dec 2007, 14:41
Ravshonbek wrote:
jimmyjamesdonkey wrote:
B!

1) Insuff. Only tells us when the work started.

2) Suff. Gives us the rate of work and how much of the job completed in x amount of time.

5/6 job - 1/2 job = 1/3 of the job was filled between 10:30 11:10 AM. So the rate is 1/120 (1/3 / 40 mins = 1/120). So.... 1 job is finished in 120 minutes or 2 hours.

OA???


I am sure the OA is B. i remember it from OG Quant book


Yeah, the question is from OGQ. Thanks for pointing that out.
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 [#permalink] New post 30 Dec 2007, 15:27
Seems like B on its own is good enough

Stat 2 tells us that in 40 mins, 1/3 of the order was completed.

Therefore , to complete entire order takes 40x3 = 120 mins = 2 hours
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Re: On Monday morning a certain machine ran continuously at a [#permalink] New post 07 Nov 2012, 23:58
I got this easy one wrong. Although the OA is B, I disagree with how they use the language.

Watch the language:"... filled 1/2 order BY 10:30AM". BY not AT. As I interpreted, it could be at 10:29AM, or at 10:01AM, or even at 00:01AM (so the machine filled 1/2 the order in 1 minute after midnight). All of the listed hours are BY 10:30AM (and also 11:10AM)

If "BY" is replaced by "AT", then this one is a no-brainer. I'm not a native speaker, is it because I don't understand GMAT English?
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Re: On Monday morning a certain machine ran continuously at a [#permalink] New post 19 Dec 2015, 13:01
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Re: On Monday morning a certain machine ran continuously at a [#permalink] New post 23 Dec 2015, 07:56
catennacio wrote:
I got this easy one wrong. Although the OA is B, I disagree with how they use the language.

Watch the language:"... filled 1/2 order BY 10:30AM". BY not AT. As I interpreted, it could be at 10:29AM, or at 10:01AM, or even at 00:01AM (so the machine filled 1/2 the order in 1 minute after midnight). All of the listed hours are BY 10:30AM (and also 11:10AM)

If "BY" is replaced by "AT", then this one is a no-brainer. I'm not a native speaker, is it because I don't understand GMAT English?

I often make the same mistakes as well. I find it hard to answer questions because I am not sure if I am interpreting the questions correctly.
Re: On Monday morning a certain machine ran continuously at a   [#permalink] 23 Dec 2015, 07:56
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