从甲地到乙地,张行2时,李行3时,张比李每时多行3.6千米,两人相向而行,相遇时离终点几千米?

2个回答

  • 设张行x Km/h,李行y Km/h.

    2x=3y;

    x-y=3.6;

    解得x=10.8,y=7.2.

    设张、李二人t时后相遇.

    (10.8+7.2)t=10.8X2

    解得t=1.2.

    张离乙地为S1=0.8X10.8=8.64Km.李离甲地为S2=2X10.8-8.64=12.96Km.