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.