A man starts a work and one more man joins him everyday. If the work is thus completed in 11 days, then find the number of days in which six men working together will finish the work?

• Let rate of 1 man doing the work be x,
  
  Then, upto 11 days the total work rate will be x+2x+3x+....+11x=66x.
  
  And now since we have 6 workers and total work is 66x => 66x/6x=11 Days
• 10 years agoHelpfull: Yes(15) No(1)
• if one man work 1 unit
  two men work 2 unit
  3 men work 3 unit and so on upto 11th day
  total unit of work done in 11 day are 1+2+3+.........+10+11 =66
  now 66 unit of work willbe done by 6 men is 66/6=11.
• 10 years agoHelpfull: Yes(5) No(1)
• let 1 man's work-done=x
  then x+2x+3x+.......11x= 66x
  then 6man can do the work =66/6=11days
• 10 years agoHelpfull: Yes(3) No(1)
• total work =1+2+........+11=66 if one man added per day then 6 man works together 66/6 =11 days required...
  
• 10 years agoHelpfull: Yes(2) No(0)
• total 12 men complete the work in 11 days.
  so 1 man can complete it in 11/12days
  so 6men will complete it in 11/2 i.e 5.5 days.
• 10 years agoHelpfull: Yes(0) No(10)