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Working individually, Abe, Bosky, and Chris could do the same job in..

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Working individually, Abe, Bosky, and Chris could do the same job in..  [#permalink]

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New post Updated on: 19 Oct 2017, 19:18
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Question Stats:

67% (01:04) correct 33% (00:00) wrong based on 6 sessions

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Working individually, Abe, Bosky, and Chris could do the same job in 12, 24 and 36 hours respectively. They decided to work in cycles of 3 hours with each person working exactly for an hour in a cycle. If they could start the work in any order and only one person works on the job at any given time, what was the minimum amount of time in which the job could be completed?

A) 18
B) 19
C) 20
D) 21
E) 22

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Originally posted by sasyaharry on 19 Oct 2017, 13:52.
Last edited by sasyaharry on 19 Oct 2017, 19:18, edited 1 time in total.
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Re: Working individually, Abe, Bosky, and Chris could do the same job in..  [#permalink]

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New post 19 Oct 2017, 17:05
Is the answer B: 19 hrs?

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Re: Working individually, Abe, Bosky, and Chris could do the same job in..  [#permalink]

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New post 19 Oct 2017, 18:54
Could you please explain as to how it becomes 20 hours instead of 19?
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Working individually, Abe, Bosky, and Chris could do the same job in..  [#permalink]

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New post 19 Oct 2017, 19:19
My bad, the answer is indeed 19. Corrected the OA.

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Working individually, Abe, Bosky, and Chris could do the same job in.. &nbs [#permalink] 19 Oct 2017, 19:19
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