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A group of workers promises to complete a piece of work in 10 days. But five of them do not report to work. If it took 12 days for the remaining workers, to complete the work, then the number of workers originally hired was
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Explanation:
Let the number of workers hired be x.
x men can do the job in 10 days
(x−5) men can do the job in 12 days
x:(x−5)=12:10
10x = 12 (x-5)
10x = 12x-60
2x = 60 => x = 30