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Eight identical machines can produce 360 aluminum cans per [#permalink]
 07 Jun 2011, 14:31
Question Stats:
92% (01:50) correct
7% (01:01) wrong based on 10 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? A. 675 B. 750 C. 1,800 D. 5,900 E. 7,500
Last edited by Bunuel on 21 Sep 2012, 04:42, edited 1 time in total.
Renamed the topic.
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Re: From MitDavidDv: Problem Solving Question-Rate [#permalink]
07 Jun 2011, 14:38
8 machines/ 360 cans = 5 machines/ x cans
8x= 1800
x=225
(225)(3 hours)= 675 cans. The answer is A.
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Re: From MitDavidDv: Problem Solving Question-Rate [#permalink]
08 Jun 2011, 03:16
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Hi, if 8 machines make 360 then 5 would make 8:360 5:x X= 225 so in 3 hours it would be 225*3=675  Posted from GMAT ToolKit
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Re: From MitDavidDv: Problem Solving Question-Rate [#permalink]
10 Jun 2011, 22:26
simple unitary method...answer A
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Re: From MitDavidDv: Problem Solving Question-Rate [#permalink]
21 Sep 2012, 04:38
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 !!
Thanks
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Re: From MitDavidDv: Problem Solving Question-Rate [#permalink]
21 Sep 2012, 04:47
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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. Answer: A. Hope it's clear.
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Re: Eight identical machines can produce 360 aluminum cans per [#permalink]
21 Sep 2012, 05:06
Thanks man. I appreciate your prompt reply  !!
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Re: Eight identical machines can produce 360 aluminum cans per [#permalink]
15 Nov 2012, 04:16
\frac{8}{M}=\frac{360cans}{1hr}==>\frac{1}{M} = 45cans/1hr
Calculate 5 machines doing work in 3 hours.
W=(5)(\frac{45cans}{1hr})(3hrs)==>W=675cans
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Re: Eight identical machines can produce 360 aluminum cans per
[#permalink]
15 Nov 2012, 04:16
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