Question

某班同學到離校24千米的農場參觀，一部分騎自行車的同學先走，1小時后，沒有自行車的同學乘汽車出發，結果他們同時到達農場，已知汽車速度是自行車速度的3倍，求兩種車的速度．

 

Answer 1

【答案】

解：設自行車的速度是千米/小時，則汽車速度是3千米/小時。

        依題意得，············································································ 4分

        方程兩邊同乘以，得72－=24，

        解得。···························································································· 7分

        經檢驗，是原方程的解，································································ 8分

        ∴原方程的解為，這時=48。

答：自行車的速度是16千米/小時，汽車速度是48千米/小時。

【解析】略