解法一 解:(1) 设小明步行X米/分,父亲骑车3X米/分。 15X 45X=3600 X=60 60×15...
.解:(1)解法一: 从图象可以看出:父子俩从出发到相遇时花费了15分钟 ·················································································· 1分 设小明步行的速度为x米/分,则小明父亲骑车的速度为3x米/分 依题意得:15x+45x=3600. ································ 2分 解得:x=60. 所以...
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