Problema Solution
the office jet printer can copy sue's dissertation in 14 min. the laserjet printer can copy the same documents in ten mins. if the two michines work toghther, how long would they take to copy the dissertion
Answer provided by our tutors
1/22+1/8=1/X
(8+22)/(22*8)1/X
30/176=1/X CROSS MULTIPLY.
30X=176
X=176/30
X=5.867 HOURS WORKING TOGETHER.
PROOF:
1/22+1/8=1/5.867
(8+22)/22*8=.17
30/176=.17
.17=.17