SOLUTION: one person can complete a task 8 hours sooner than another person. working together both people can perform the task in 3 hours. How many does it take each person to complete the
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Question 873130: one person can complete a task 8 hours sooner than another person. working together both people can perform the task in 3 hours. How many does it take each person to complete the task working alone?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of working to
get their rate working together
-----------
1st person's rate:
( 1 task ) / ( t - 8 hrs )
where (t) is in hours
-------------------
2nd person's rate:
( 1 task ) / ( t hrs )
-----------------
Rate working together:
( 1 task ) / ( 3 hrs )
--------------------
Multiply both sides by
------------------------
complete the square
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The 1st person takes 4 hrs
The 2nd person takes 12 hrs
-------------------------
check answer:
OK
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