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#1 2009-10-07 22:09:09
- Abhishek Gijare
- Guest
need answer to the question
if a job is done by 3 worker in 21 days , then how many days it will take for 7 workers, if all the other conditions are remain same.
#2 2009-10-07 22:23:51
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: need answer to the question
Hi Abhishek Gijare;
Each day 1 worker does 1 / 3 * 1 / 21 = 1 / 63 of the job. 7 workers do 7 / 63 = 1 / 9 of the job each day. So it will take them 9 days.
Or: 21 / (7 / 3) = 9
Last edited by bobbym (2009-10-07 22:26:53)
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