A can do a piece of work alone in 96 days and B can do it alone in 104 days. In how many days can the duo, working together, complete the work?

49.94 49.92 49.96 49.88

49.92

A = 96 days, B = 104 days, ⇒ Time required for A + B to complete the work = \(\frac{1248}{13+12}\) = \(\frac{1248}{25}\) = 49.92 days,  ..(\(\frac{Work}{Efficiency}\) = Time)