A and B can together do a piece of work in 10 days. If A works with twice of his efficiency and B works with an efficiency 1/3rd less than his efficiency, then the work gets completed in 6 days. In how many days can A and B do the work alone respectively?

• 40/3, 40
• 20/3, 20
• 30, 20/3
• 50/3, 25