SOLUTION: two people are working on a task. Working alone, the first person could finish the task in 5hr, while it would take the second person 8 hour. How long would it take for them to fin

Algebra ->  Rate-of-work-word-problems -> SOLUTION: two people are working on a task. Working alone, the first person could finish the task in 5hr, while it would take the second person 8 hour. How long would it take for them to fin      Log On


   

Question 866011: two people are working on a task. Working alone, the first person could finish the task in 5hr, while it would take the second person 8 hour. How long would it take for them to finish the task working together?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

amount done per hour Key to the set Up

 1%2F5+%2B+1%2F8+=+1%2Fx   |Multiplying thru by 40x so as all denominators = 1

 8x + 5x = 40

    13x = 40

      x = 40/13,   3  1/13 hr