SOLUTION: Worker "A" can do a certain job in 3hrs, while "B" can do same same work in 4hrs of they work together, how long will it take them to do job?

Question 1049638: Worker "A" can do a certain job in 3hrs, while "B" can do same same work in 4hrs of they work together, how long will it take them to do job?
Found 2 solutions by advanced_Learner, ikleyn:
Answer by advanced_Learner(501)   (Show Source): You can put this solution on YOUR website!
A data
time 3
rate 1/3
B date
time 4
rate 1/4
so
1/3+1/4=1/r
(4+3)/12=1/r
7/12=1/r
=

Answer by ikleyn(52818)   (Show Source): You can put this solution on YOUR website!
.
A wide variety of similar introductory joint-work problems were solved for you with detailed explanations in these 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

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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