Option 2: evaporate 4 kg of water.
(2) It takes X days for Team A to do it alone, and Y days for Team B to do it alone.
15/3x+40/2y= 1
16/4x+40*5/8y= 1
Solution: x = 9, y = 45.
( 1-2* 1/9)=7/9
7/9 divided by 1/45 = 35
A: It will take another 35 days to complete.