18 worker can do a piece of work in 180days. if four more workers join in then find the number of days in which the worker can be completed
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180/18=10
So one worker can do ten days work
Plus 4
So 4*10 days work reduced
4*10=40
180-40=140 days
So one worker can do ten days work
Plus 4
So 4*10 days work reduced
4*10=40
180-40=140 days
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