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Eight identical machines can produce 360 aluminum cans per [#permalink]
07 Jun 2011, 13:31

00:00

A

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D

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Difficulty:

5% (low)

Question Stats:

97% (01:45) correct
3% (00:42) wrong based on 112 sessions

Eight identical machines can produce 360 aluminum cans per hour. If all of the machines work at the same constant rate, how many cans could 5 such machines produce in 3 hours?

Re: From MitDavidDv: Problem Solving Question-Rate [#permalink]
21 Sep 2012, 03:38

Hi Everyone,

I have a question, can we solve this question using the W=RT method ? Please reply.. if yes.. please tell me as i am getting wrong answer if i go that way !!

Re: From MitDavidDv: Problem Solving Question-Rate [#permalink]
21 Sep 2012, 03:47

1

This post received KUDOS

Expert's post

154238 wrote:

Hi Everyone,

I have a question, can we solve this question using the W=RT method ? Please reply.. if yes.. please tell me as i am getting wrong answer if i go that way !!

Thanks

Eight identical machines can produce 360 aluminum cans per hour. If all of the machines work at the same constant rate, how many cans could 5 such machines produce in 3 hours?

A. 675 B. 750 C. 1,800 D. 5,900 E. 7,500

(rate of one machine)*(number of machines)*(time)=(work done) --> (rate of one machine)*8*1=360 --> (rate of one machine)=45 cans per hour.

Now, 5 such machines in 3 hours can produce (rate of one machine)*(number of machines)*(time)=45*5*3=675 cans.

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