George printing press can print an edition of newspapers in 12 hours while Paul’s press can print the same edition in 18 hours. What is the total no. of hours the press working together but independent of one another to print the same edition?
a) 15 b) 17.4 c) 7 d) 7.2

• George one hour work=1/12
  Paula one hour work=1/18
  so
  1/12+1/18=> 5/36
  The total number of hours to print the same edition is 36/5=>7.2
• 12 years agoHelpfull: Yes(43) No(5)
• ans=7.2
  because george one hour work =1/12
  paul one hour work=1/18
  so
  1/12+1/18=5/36
  total no of hour to print the same edition=36/5=7.2
• 12 years agoHelpfull: Yes(6) No(3)
• Ans. 15
  
  (12+18)/2 = 15
  
  As the line independent of one another resembles that they are working together but independently. 7.2 will be ans if the work together depending on each other.
• 12 years agoHelpfull: Yes(3) No(0)
• ans=7.2
  since A Workdone=112
  B workdone =118
  A+B=(112)+(118)
  A+B WORKDONE =536
  NOW TIME IS =(365)=7.2
  
• 12 years agoHelpfull: Yes(2) No(7)
• ans=7.2
  sorry i do a mistake in that question .
  A's workdone=112
  B's workdone=118
  (A+B)'S workdone=(112)+(118)
  (A+B)=(536)
  NOW TIME TAKEN =(365)=7.2..............
• 12 years agoHelpfull: Yes(2) No(8)
• THAT 36/5=7.2
  AND A=1/12
  B=1/18
  A+B=1/12+1/18
  SO ON........
• 12 years agoHelpfull: Yes(2) No(2)
• ans d
  1/12+1/18=5/36
  together-----36/5=7.2
  
• 12 years agoHelpfull: Yes(2) No(2)
• thanks, i understood the answer.
  but i have one question, from where can i find this kind of question (i.e. source). i am preparing for TCS , ans for that i am solving their papers. i did not come across to any such question.
  
  from where did you find this question!? let me know such question bank for new pattern of TCS aptitude.
  
  thanks.
• 12 years agoHelpfull: Yes(2) No(6)
• George's 1 hr. work=1/12
  Paula's 1 hr. work=1/18
  1/12+1/18=5/36
  total no. of hours=36/5=7.2
  
• 12 years agoHelpfull: Yes(2) No(2)
• ans is 7.2..
  1st printer=1/12
  2nd printer=1/18
  -->216/30=7.2
• 12 years agoHelpfull: Yes(1) No(2)