SOLUTION: Lisa, an experienced clear can fill a certain order in 13 hours. Jim a dies the same job in 15 hours. How long will it take them to fill a order working together.
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Question 901512: Lisa, an experienced clear can fill a certain order in 13 hours. Jim a dies the same job in 15 hours. How long will it take them to fill a order working together.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/a+1/b=1/x
1/13+1/15=1/x
15/195+13/195=1/x
28/195=1/x
195/28=x
x=6.96428571 hours working together
ok
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