SOLUTION: please tell me the solution of this problem. A labourer can do a job in 3 days, a second can do it in 6 days, and a third can do it in 7 days. How many days can the three do t

Question 1054015: please tell me the solution of this problem.
A labourer can do a job in 3 days, a second can do it in 6 days, and a third can do it in 7 days.
How many days can the three do the job if they work together?
Give answer in fractional form.

days=
Answer by ikleyn(52800) (Show Source): You can put this solution on YOUR website!
.
please tell me the solution of this problem.
A labourer can do a job in 3 days, a second can do it in 6 days, and a third can do it in 7 days.
How many days can the three do the job if they work together?
Give answer in fractional form.
~~~~~~~~~~~~~~~~~~~~~~~~~~~

The first worker  can do  of the work per day.

The second worker can do  of the work per day.

The third  worker can do  of the work per day.

Working together, the three can do 

 =   =  =  = 

of the work per day.

Hence, it will take  =   days for the three workers to complete the job working together.

A wide variety of similar joint-work problems were solved for you with detailed explanations in the lessons
    - Using Fractions to solve word problems on joint work,
    - Solving more complicated word problems on joint work,
    - Selected joint-work word problems from the archive
in this site.

Read them and get be trained in solving joint-work problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic "Rate of work and joint work problems" of the section "Word problems".

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