SOLUTION: Three people using word processor worked together preparing a group of form letters . Koonce could have done them alone in 2 h, Schaeffer in 3 h and Yeldell in 2h. how long did t

Question 331745: Three people using word processor worked together preparing a group of form letters . Koonce could have done them alone in 2 h, Schaeffer in 3 h and Yeldell in 2h. how long did they need to do the letters working together?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Koonce 2 hours 1/2 job in 1 hour
Schaeffer - 3 hours 1/3 job in 1 hour
Yeldell - 2hours 1/2 job in 1 hour
..
together they will take 1/2 + 1/3 +1/2 job in 1 hour
4/3 hours
so they will together do the job in 3/4 hours
..

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