A takes 12 hrs to complete a work
B takes 10 hrs to complete the same work
time taken by them to make 2 publications working independently.

• ans is (10+2)=12 hrs,bcoz they are working independently.
  
• 11 years agoHelpfull: Yes(26) No(13)
• A takes 24 hrs to complete two works
  B takes 20 hrs to complete two works
  
  working independently.
  1/20 + 1/24 = 11/120
  hence ans is 120/11
• 11 years agoHelpfull: Yes(13) No(9)
• since they r working independently on 2 diff publications so total time taken =10(hours by A)+2(hours taken by B)=12 hrs
• 11 years agoHelpfull: Yes(6) No(1)
• A=1/12
  B=1/10
  Both can do it x days=>1/12 + 1/10 =1/x
  (10+12)/120=1/x
  22/120=1/x =>x=120/12=>x=5.45
• 11 years agoHelpfull: Yes(4) No(8)
• A can do in=1/12
  B can do in=1/10
  together they can do=1/12+1/10=11/60
  i.e in 60/11 hrs=5.45 hrs
• 11 years agoHelpfull: Yes(4) No(6)
• plz explain how it comes 12.
• 11 years agoHelpfull: Yes(4) No(1)
• (12*10)/(12+10)=120/11
• 11 years agoHelpfull: Yes(2) No(0)
• question not clearly mentioned.
  if they working separatley on 1+1 publication,time =10+12=22hr
• 11 years agoHelpfull: Yes(2) No(3)
• (1/12*2)+(1/10*2)=1/24+1/10
  =7.08 days
• 11 years agoHelpfull: Yes(1) No(9)
• 22h(because A takes 12 h for complete one publication work ,and b takes 10h to complte one publication work)
• 9 years agoHelpfull: Yes(1) No(2)