31 A takes 12 hrs to make a publication B takes 10 hrs to make a publication Find the time

ans is 11hours 40 mins
12 years agoHelpfull: Yes(8) No(2)
haha simple as they are working independently a takes 12hrs to make one publication in the mean time as b takes 10hrs ,b will compete the 2nd publication... that is according to the question ... now if they work together time taken to complete 2 publications is 60/22
12 years agoHelpfull: Yes(6) No(4)
@vasu plz xplain...
12 years agoHelpfull: Yes(3) No(1)
Being working independently it will take 12 hours to make the publication(Hint: They are working independently)
12 years agoHelpfull: Yes(3) No(1)
11 hours 40 minutes
12 years agoHelpfull: Yes(3) No(2)
24+20=44
total time wrkin independently
12 years agoHelpfull: Yes(2) No(1)
plz explain it....
12 years agoHelpfull: Yes(1) No(2)

31) A takes 12 hrs to make a publication. B takes 10 hrs to make a publication. Find the time taken by them to make two publications, working independently.