A can copy 50 papers in 10 hrs, while A & B can copy 70 papers in 10 hrs. How many hours are required for B to copy 26 papers?

• 13 hrs
  
  A can copy 50 papers in 10 hrs, while A & B can copy 70 papers in 10 hrs.
  It means B can copy 20 papers in 10 hrs.
  
  Then time taken by B to copy 26 papers = 26*10/20 = 13 hours
• 12 years agoHelpfull: Yes(28) No(1)
• a 1hrs wrk=50/10;
  a&b 1hrs wrk=70/10;
  b 1hrs wrk=7-5= copy 2 paprs in 1hrs;
  then 26 papers=13hrs
  
• 12 years agoHelpfull: Yes(9) No(1)
• 13 hrs
  
  
  
  time taken by B to copy 26 papers = 26x10/20 = 13 hours
• 12 years agoHelpfull: Yes(6) No(1)
• A 1HR= 5P
  A+B 1HR=7P
  therefore, B 1HR=2PAPER
  B 1P= 1/2HR
  B 26P= 1/2 * 26 = 13 Ans
  
• 12 years agoHelpfull: Yes(1) No(0)
• B will take 13 hours to copy 26 papers
• 6 years agoHelpfull: Yes(0) No(0)