设甲送Ax吨,则送B(14-x)吨.乙送A(15-X)吨,送B(x-1)吨.
总运费W=50x+30(14-x)+60(15-x)+45(x-1)
=50x+420-30x+900-60x+45x-45
=5x+1275(1≤x≤14)
所以,当x=1时W有最小值为1280
设甲送Ax吨,则送B(14-x)吨.乙送A(15-X)吨,送B(x-1)吨.
总运费W=50x+30(14-x)+60(15-x)+45(x-1)
=50x+420-30x+900-60x+45x-45
=5x+1275(1≤x≤14)
所以,当x=1时W有最小值为1280