a contractor with the workforce of 4 20 men can complete a work of construction of a building in 9 months due to request by the owner he was asked to complete the job in 7 months how many extra man he must employee to complete the job
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Answer:
men. Time
420. ... 9 mos
x. ? .. 7mos
Step-by-step explanation:
x=Totalmen
x = 9x420/7=540
extra men required=540-420=120
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