A and B together can complete a work in 20 days. B alone can complete in 30 days. If A does the work only half a day daily, then in how many days A and B together will complete the work ? 1)15 days 2)18 days 3)20 days 4)24 days

• ans-- c)24
  A+B = 1/20
  B=1/30
  So A's working days = 1/20-1/30
  A=1/60
  after a does half work daily=>(1/60)/2=>1/120
  A+B= 1/120+1/30=1/24
  A+B Together working days is24 days
• 6 years agoHelpfull: Yes(5) No(0)
• Ans --20days
  A+B = 1/20
  B=1/30
  So A's working days = 1/20-1/30
  A=1/60
  After A+B= 1/60+1/30
  1/20
  A+B Together working days is 20 days
• 6 years agoHelpfull: Yes(0) No(8)
• the answer is 15 days.
• 5 years agoHelpfull: Yes(0) No(3)