SOLUTION: person 1 can do a certain job in fifteen minutes, and person 2 can do the same job in thirty minutes. when completing the job together, which expression would be used to represent
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Question 1156190: person 1 can do a certain job in fifteen minutes, and person 2 can do the same job in thirty minutes. when completing the job together, which expression would be used to represent the amount of work done by person 1?.
Found 2 solutions by greenestamps, josmiceli:
Answer by greenestamps(13203) (Show Source): You can put this solution on YOUR website!
no choices given....
The first person works twice as fast; so when working together with the second person, the first person does 2/3 of the job and the second person does 1/3.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of working
Let = time in minutes to
finish job working together
Multiply both sides by
min
The whole job gets done in min
---------------------------------------------
To get the fraction of the job done by worker 1:
----------------------
To get the fraction done by worker 2:
---------------------------------------------
Worker 1 does 2/3 of the job in 10 min
---------------------------------------------
Note that I can write the equation like this:
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