SOLUTION: Jonathan can type a 20 page 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 d

Algebra ->  Human-and-algebraic-language -> SOLUTION: Jonathan can type a 20 page 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 d      Log On


   

Question 109994: Jonathan can type a 20 page 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 scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let x="combined time" ... (x/40)+(x/30)+(x/24)=1

they each type some fraction of the document based on the combined time