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Re: Machine rate problem [#permalink]
07 Jun 2011, 17:27

1

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We have to find out the minumum no. hours that machine B HAS to run. Now we have the output for 8 hrs for both the machines (nothing given about the no. of hrs each runs)

Lets assume Machine A runs for full 8 hrs..it produces 72000 units. Now the remaining 28000 have to be produced by B..which it would do in 28000/7000 = 4 hrs...

I would slightly tweak the wording in the problem to say "if both of them operate simultenously or otherwise for 8 hrs..." (but I guess it would make the question far to easy!!)
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Re: Machine rate problem [#permalink]
08 Jun 2011, 00:51

So you're saying B HAS to run for atleast 4 hours? But what if A runs less than 8 hrs.. Is it given that it has to run for atleast 7 hours? I think than the answer would change unless the result has to be an integer multiple of both rates.. I was actually thinking the same thing as walker about the combined rate.. Anyone?

Re: Machine rate problem [#permalink]
08 Jun 2011, 01:26

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l0rrie wrote:

So you're saying B HAS to run for atleast 4 hours? But what if A runs less than 8 hrs.. Is it given that it has to run for atleast 7 hours? I think than the answer would change unless the result has to be an integer multiple of both rates.. I was actually thinking the same thing as walker about the combined rate.. Anyone?

The question asks the min. no of hrs B should run..we have a given output and no. Of hrs..A can run for a maximum of 8 hrs..and the shortfall in the output would be covered by B.. I agree the language of the question can be improved but this is what I think given the problem at hand...

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Re: Machine rate problem [#permalink]
08 Jun 2011, 08:59

I think maverick04 is correct. I see how you solved the problem now. Thanks so much. Sorry for wording the question so badly. I got it off this online problem generating website and I am unable to regenerator the same problem. I wrote down the problem in short-hand style and so I don't remember the exact wording. Again, Thanks so much for all your help.

Re: Machine rate problem [#permalink]
08 Jun 2011, 17:15

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teebumble wrote:

I think maverick04 is correct. I see how you solved the problem now. Thanks so much. Sorry for wording the question so badly. I got it off this online problem generating website and I am unable to regenerator the same problem. I wrote down the problem in short-hand style and so I don't remember the exact wording. Again, Thanks so much for all your help.

Anytime mate
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