the office jet printer can copy maria's dissertation in 16 min. the jet printer can copy the same document is 8 min if the two machines work together how long would they take to copy the dissertation

Answer 1

Combined rate
= 1/16 dis/min + 1/8 dis/min
= 3/16 dis/min

(3/16)*T = 1 dissertation
T = 16/3 = 5.33 minutes