There are several flyers that need to be printed. Working alone, Printers A, B, and C can finish the task in 3, 4, and 8 hours, respectively. If we use all three printers simultaneously, how many minutes will it take to finish the printing task?
+2407 A will do 1/3 of the task in 1 hour.
B will do 1/4 of the task in 1 hour.
C will do 1/8 of the task in 1 hour.
Together, they do 1/3 + 1/4 + 1/8 of the task in 1 hour.
How many hours does it take?
=^._.^=
+37159 Their rates per job are 1job/ 3 hours 1/4 and 1/8
combining their rates for the one job:
1 job / ( 1/3 + 1/4 + 1/8) = _______ hours ( multiply this answer by 60 to get 'minutes')
