Question

一批货物准备运往某地,有甲、乙、丙三辆卡车雇佣.若甲、丙两车合运相同次数运完这批货物,甲车共运了180吨；若乙、丙两车合

Answer 1

设甲、乙、丙一次运x,y,z吨,总共s吨

则:y=2x

sx/(x+z)=180 => sx=180x+180z..1

sy/(y+z)=270 => sy=270y+270z..2

1,2式联立消去z,并用y=2x代入,得:

s=540

N=540*20=10800

代回1式得:540x=180x+180z => 2x=z

所以x:...