Q. There is a work which can be completed by A with 12 days and B by 18 days. A and B works together for 3 days and B left. After that how many days for A to complete the work?

• work done by A per day=1/12
  
  work done by B per day=1/18
  
  work done by A and B per day=1/12+1/18=5/36
  
  work done by A and B for 3 days=5*3/36=5/12
  
  work remasining=1-5/12=7/12
  
  . After that A takes 7days to complete the work
• 11 years agoHelpfull: Yes(26) No(3)
• Work done by A in 1 day = 1/12
  Work done by B in 1 day = 1/18
  Work done by both (A +B) in 1 day =(1/12+1/18) = 5/36
  As per question A and B both work together for 3 days.
  So Work done by both (A+B) in 3 days = 3*(5/36) = 5/12
  Work remaining for A (because B is left) =1-(5/12) =7/12
  Work done by A in 1 day = 1/12
  Therefore A finishes remaining work in 7 days.
  The answer is 7 days
• 11 years agoHelpfull: Yes(6) No(1)
• one day work of A = 1/12
  one day work of B = 1/18
  one day work of A+B = 5/32
  
  B left after 3 days
  
  Work completed before b left = 5/12
  work left = 7/12
  
  A alone will take 7 days
• 11 years agoHelpfull: Yes(3) No(1)
• Work done by A in 1 day = 1/12
  Work done by B in 1 day = 1/18
  Work done by both (A +B) in 1 day =(1/12+1/18) = 5/36
  As per question A and B both work together for 3 days.
  So Work done by both (A+B) in 3 days = 3*(5/36) = 5/12
  Work remaining for A (because B is left) =1-(5/12) =7/12
  Work done by A in 1 day = 1/12
  Therefore A finishes remaining work in 7 days.
  The answer is 7 days
  
• 8 years agoHelpfull: Yes(1) No(0)
• answer is 720. Because, 6 is multiplied by 4 to give 24. Next, 24 is multiplied by 5 to give 120. Then definitely next 120 must be multiplied by 6 to give 720. Therefore, answer is 720
• 6 years agoHelpfull: Yes(0) No(4)
• answer will be seven days.
• 6 years agoHelpfull: Yes(0) No(0)