汶川地震，震後2小時，某武警率部隊從XX縣出發去營救，13日淩晨1:15分動身，但途中遇到了麻煩，他們决定步行，但到達理縣後因救人而耽誤了1小時.隨後，先派遣分隊將步行速度提高了9分之1.於13日23時15分到達汶川~ 求先遣分隊從理縣到汶川的平均速度是多少？我會加的！還求從開始到理縣的時間從理縣到汶川的速度和時間（這是表格）從開始到理縣是30千米，從理縣到汶川是60千米是求從XX縣到理縣的時間從理縣到汶川的速度和時間求先遣分隊從理縣到汶川的平均速度是多少？ ``````````````````````````````````````````````````````````` 暈啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊`````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` ````````````````````````````````````````````````````

設先遣分隊從理到汶川的平均速度是X千米每時
用時22小時，但步行時間T=22-1=21小時
由題意列方程：（30/x）+[60/（x+x/9）]=21
解方程得：84/x=21
x=4千米每時
答：先遣分隊從理到汶川的平均速度是4千米每時.（不好意思剛看到題目，希望對有所幫助）