1。设单位到家距离为S,从家到单位花的时间是(1/3)S/8+(2/3)S/16,
S=3/8【(1/3)S/8+(2/3)S/16-0.5]*8+5/8【(1/3)S/8+(2/3)S/16-0.5】*16
得出S=78
4。S/75-8=S/80-6 得S=4000 4000/80-6=44 4000/44=90.9
1。设单位到家距离为S,从家到单位花的时间是(1/3)S/8+(2/3)S/16,
S=3/8【(1/3)S/8+(2/3)S/16-0.5]*8+5/8【(1/3)S/8+(2/3)S/16-0.5】*16
4。S/75-8=S/80-6 得S=4000 4000/80-6=44 4000/44=90.9
应该吧