SOLUTION: the officejet printer can copy lisa's dissertation in 16 min. the laserjet printer can copy the same document in 18 min. if the two machines work together , how long would they tak
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Question 969961: the officejet printer can copy lisa's dissertation in 16 min. the laserjet printer can copy the same document in 18 min. if the two machines work together , how long would they take to copy the dissertation?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
the officejet printer can copy lisa's dissertation in 16 min. the laserjet printer can copy the same document in 18 min. if the two machines work together , how long would they take to copy the dissertation?
***
1/16=work rate of office jet printer
1/18=work rate of laser jet printer
let x=time it would take two machines work together to copy the dissertation.
1/x=their work rate
isum of indv work rates=work rate working together
lcd: 16*18=288
18+16=288/x
34x=288
x=8.47
if the two machines work together , how long would they take to copy the dissertation? 8.47 min
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