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Machine A and Machine B are each used to manufacture 660

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Director
Director
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Joined: 15 Aug 2005
Posts: 804
Location: Singapore
Followers: 2

Kudos [?]: 8 [0], given: 0

Machine A and Machine B are each used to manufacture 660 [#permalink] New post 11 Oct 2005, 06:33
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A
B
C
D
E

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Machine A and Machine B are each used to manufacture 660 sprockets. IT takes machine 10 hours longer to produce 660 sprockets than machine B. Machine B produces 10% more sprockets per hour than machine A. How many sprockets does machine A produce per hour?

A. 6
B. 6.6
C. 60
D. 100
E. 110

Pls explain your logic! Thanks!
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Cheers, Rahul.

Manager
Manager
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Joined: 04 May 2005
Posts: 133
Location: Chicago
Followers: 1

Kudos [?]: 2 [0], given: 0

[#permalink] New post 11 Oct 2005, 06:48
A. 6.
quantity=rate*time

Machine A: 660=xy, x=rate, y=time
Machine B: 660=(1.1x)(y-10). This info is given in the stem.

You have 2 equations with 2 variables. Plug and solve for x. x=6
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Christopher Wilson

Director
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Joined: 15 Aug 2005
Posts: 804
Location: Singapore
Followers: 2

Kudos [?]: 8 [0], given: 0

 [#permalink] New post 11 Oct 2005, 07:01
Well, wouldnt I wanna bang my head against the wall?
Im sure you can empathize....11 in the night after a days long work! :wink:
_________________

Cheers, Rahul.

  [#permalink] 11 Oct 2005, 07:01
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Machine A and Machine B are each used to manufacture 660

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