So S= 108.
2. Set up * * to buy X sets.
(32000/(X/3)+ 10)*(2X/3)= 68000
X=600
3. Robot A carries X kinds of chemical raw materials every hour, and robot B carries Y kinds of chemical raw materials every hour.
X=Y+30
900/X=600/Y
x = 90°
Y=60
It takes X days for Team A to complete this task alone, and X+2 days for Team B to complete this task alone.
The total amount is 1
2 *( 1/X)+3 * 1/(X+2)= 1
X=4