(1)A有X =>洞前物纳液 B有200-X 因 B=A*(2/3)=>3B=2A I.E. 3(200-X)=2X=>悔基600-3X=2X =>5X=600 => X=120...A; 200-120=80...B (2)40*120+60*80=9600...ANS
B=3/2B==200A*120 B*80=4800 =4800