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6 machines working at a constant rate can complete one task

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6 machines working at a constant rate can complete one task [#permalink] New post 05 Aug 2014, 09:10
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Question Stats:

76% (01:45) correct 24% (00:23) wrong based on 41 sessions
6 machines working at a constant rate can complete one task in 12 days. How many more machines, working at the same constant rate, will be needed to complete the same task in 8 days?

A.2
B.3
C.8
D.5
E.4


Have no idea why I am blanking trying to solve this- is it tricky or is there something very simple I am missing here..

Question Discussed here: six-machines-each-working-at-the-same-constant-rate-127112.html#p1039964
[Reveal] Spoiler: OA
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Re: 6 machines working at a constant rate can complete one task [#permalink] New post 05 Aug 2014, 09:56
saadiagha wrote:
6 machines working at a constant rate can complete one task in 12 days. How many more machines, working at the same constant rate, will be needed to complete the same task in 8 days?

A.2
B.3
C.8
D.5
E.4


Have no idea why I am blanking trying to solve this- is it tricky or is there something very simple I am missing here..


Hi, look here six-machines-each-working-at-the-same-constant-rate-127112.html
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Re: 6 machines working at a constant rate can complete one task [#permalink] New post 05 Aug 2014, 10:06
saadiagha wrote:
6 machines working at a constant rate can complete one task in 12 days. How many more machines, working at the same constant rate, will be needed to complete the same task in 8 days?

A.2
B.3
C.8
D.5
E.4


Have no idea why I am blanking trying to solve this- is it tricky or is there something very simple I am missing here..


No worries

Expert Reply here : six-machines-each-working-at-the-same-constant-rate-127112.html#p1039964

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Re: 6 machines working at a constant rate can complete one task   [#permalink] 05 Aug 2014, 10:06
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