Latest Book Aptitude Question SOLUTION: 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 th

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(#M40027412) BOOK question Keep an EYE

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

Asked In Book Manish Tiwari (10 years ago)

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sandeep  (9 years ago)

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

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sarathjo  (6 years ago)

66/6
ans =11

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