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# Six machiens, each working at the same constant rate,

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Senior Manager
Joined: 03 Jul 2006
Posts: 481
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Kudos [?]: 6 [0], given: 0

Six machiens, each working at the same constant rate, [#permalink]  17 Sep 2006, 12:55
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Six machiens, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the job in 8 days?

A. 2
B. 3
C. 4
D. 6
E. 8
Senior Manager
Joined: 28 Aug 2006
Posts: 302
Followers: 10

Kudos [?]: 99 [0], given: 0

[#permalink]  17 Sep 2006, 18:38
If 6 machines takes 12 days
to complete the same work in 8 days we nedd12/8 x 6 = 9 machines

So 3 machines are needed additionally.
So B is the answer.

Hey Buddy, this is a simple question. Please go through the basics of every topic. I think then only u can understand most of the questions posted here in this forum
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[#permalink] 17 Sep 2006, 18:38
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# Six machiens, each working at the same constant rate,

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