SOLUTION: kipketer can cultivate a piece of land in 7hours while Wanjiku can do the same work in 5hours.Find the time they would take to cultivate the same piece of land when working togethe

Question 1107344: kipketer can cultivate a piece of land in 7hours while Wanjiku can do the same work in 5hours.Find the time they would take to cultivate the same piece of land when working together
Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.

K makes    of the job per hour.


W makes    of the job per hour.


Working together, they make   +   of the job per hour.


 +  =  +  = .


Thus working together they make    of the job per hour.


It means they need   hours = 35*5 minutes = 175 minutes = 2 hours and 55 minutes to complete the job working together.


Answer.  2 hours and 55 minutes.

Solved.

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It is a typical joint work problem.

There is a wide variety of similar solved joint-work problems with detailed explanations in this site. See 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

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".

Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.

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