SOLUTION: Ramesh , Suresh and Harish can do a piece of work in 15 days, 10 days and 6 days respectively. how many days will it take to complete the same work if they work together?

Question 324910: Ramesh , Suresh and Harish can do a piece of work in 15 days, 10 days and 6 days respectively. how many days will it take to complete the same work if they work together?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Ramesh does the job in 15 days
so he does 1/15 of the job in 1 day.
..
Suresh does the job in 10 days
so he does 1/10 of the job in 1 day.
..
Harish does the job in 6 days
so he does 1/6 of the job in 1 day.
..
they together will do 1/15+1/10+1/6 of the job in 1 day
LCM = 60
=4+6+10 / 60
=20/60 = 1/3
They together do 1/3 of the job in 1 day.
so for 1 job they take 3 days
Ananth
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