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wrong answer in test

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wrong answer in test [#permalink]

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New post 14 Jul 2011, 09:30
83. If 2 printing presses can print 3000 pages in 1 hour, how many presses will be required to print 5000 pages in 20 minutes? (A) 5 (B) 6 (C) 8 (D) 9 (E) 10
should not answer be 20
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Re: wrong answer in test [#permalink]

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New post 14 Jul 2011, 09:36
Thanks - please see here: presses-4404.html
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New post 15 Jul 2011, 09:57
bb wrote:
Thanks - please see here: presses-4404.html


Shouldnt the answer be 10.

If 2 printing presses can print 3000 pages in 1 hour, how many presses will be required to print 5000 pages in 20 minutes?

2 presses>3,000pages>1hour
1 press>1500 pages>1 hour
1 press= 1500/60 pages per minute= 25 pages per min.

So in 20 mins 1 press prints 500 pages. 10 will print 5,000 pages in 20 mins.

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Re: wrong answer in test   [#permalink] 15 Jul 2011, 09:57
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