SOLUTION: If John completes 5 tasks in 4.5 minutes and Bob completes 5 tasks in 9 minutes, how long will it take to complete 5 tasks if they work together?

Question 481226: If John completes 5 tasks in 4.5 minutes and Bob completes 5 tasks in 9 minutes, how long will it take to complete 5 tasks if they work together?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
If John completes 5 tasks in 4.5 minutes and Bob completes 5 tasks in 9 minutes,
how long will it take to complete 5 tasks if they work together?
:
Let t = time required when working together
Let the completed job = 1 (the completion of 5 tasks)
:
+ = 1
multiply by 9 to clear the denominators
2t + 1t = 9
3t = 9
t =
t = 3 min working together
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