A project has been started by a man on the first day. Each subsequent day a new person joined the work force and it is known that the work got completed on the 11th day .If from the starting day 6 men working on the project and no new men added later , in how many days the work got completed

• Assume 1day work of a man is 1 unit.
  If a new person joined the work on second day, 2 units of work get completed.
  Similarly 3 units on 3rd day,
  4 units on 4th day so on...
  Then for all the eleven days the total work = 1 + 2 + 3+ .............11 = 66 units (Use formula n(n+1)/2)
  
  Now 6 men perday work = 6 units per day.
  
  They can complete 66 units of work in = 66/6=11 days
• 9 years agoHelpfull: Yes(0) No(0)
• 66/6
  ans =11
• 6 years agoHelpfull: Yes(0) No(0)