SOLUTION: Jonathan can type a 20 page document in 40 minutes, Susan can type it in 30 minutes, and Jack can type it in 24 minutes. Working together, how much time will it take them to type t

SOLUTION: Jonathan can type a 20 page document in 40 minutes, Susan can type it in 30 minutes, and Jack can type it in 24 minutes. Working together, how much time will it take them to type t

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Question 303895: Jonathan can type a 20 page document in 40 minutes, Susan can type it in 30 minutes, and Jack can type it in 24 minutes. Working together, how much time will it take them to type the same document?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x/40+x/30+x/24=1
x/20+x/15+x/12=1
x=10 minutes working together
check
10/40+10/30+10/24=1
3/12+4/12+5/12=1
ok
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