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a contractor undertakes to complete a piece of work in 20days .hence he employs 18 workers .but after 12 days he finds that only half of the work has been done.how many addiional workers should he employ to complete the same within the given period?

Answer :

samysamarsidhu
He should not employ any additional worker as he is enough to complete the work himself. 
it requires 1 more additional worker

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