60 men can complete a work in 40 days. 60 men start the work but after every 5 days, 5 men leave. In how many days the work will be completed?

• W=60*40=2400
  5*60+5*55+5*50-----+5*5+5*0=5(5+10+-----+60)
  =5(5*(1+2+3----12))
  = 25*78=1950
  Remaining work=2400-1950=450
  18.75 % work is incomplete and 81.25% work is complete
  so The work will never be completed
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• work canno be completed
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• ans is 5+38.18=430.1818 days
  the ramaining work will be comleted in 38.18 days
  (60*40-5*60)/55=38.18 days
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