1.8x=960 x=120
6y=960 y=160
x/y=3/4
2.设路程s,乙速v
(s-(5/11)s)/v=(5/11)/4.5
v=27/5
3.设甲x,乙y,丙z
x+y+z=525
x/y=2:3
y/z=4:5
x=120,y=180,z=225
1.8x=960 x=120
6y=960 y=160
x/y=3/4
2.设路程s,乙速v
(s-(5/11)s)/v=(5/11)/4.5
v=27/5
3.设甲x,乙y,丙z
x+y+z=525
x/y=2:3
y/z=4:5
x=120,y=180,z=225