数学题：客车和货车分别从A B两站同时相向开出，5小时后相遇。相遇后，两车仍按原速度前进，当他们相距196千米时，货车行了全程的80%，客车已行的路程与未行的路程比是3：2，求AB两站的路程。这个谁会？

数学题解答：“客车已行的路程也未行的路之比是3：2”，说明客车已行全程的3÷（3+2）＝3/5，与货车行的80%加起来比全程多了：3/5 + 80% – 1 ＝40%。

而两车现在的距离就是全程的40%，所以全程是：

196 ÷ 40% ＝490（千米）

答：AB两站的路程是490千米。

推荐阅读：
Ed-Tech Start-Ups Can Allow Anyone To Become A Teacher　 Russian Hacker Sold Millions Of Passwords For Less Than A $1, Sh　 How To Successfully Fine-tune Your Overall Social Media Strategy　 What It Really Takes To Make Money As a Blogger　 How Do You Increase Website Domain Authority?　 Bitcoin Expert Regrets Blogging About Rumored Bitcoin Creator　 WordPress Theme Seller, Templatic, Warns Users Of Hacking　 Samsung Utilizes Virtual Reality Stories For Children’s Bedtimes　 6 Things You Need to Do Before Writing a Single Word on Your Blo　 Verge Introduces Innovative Gadget Blog, ‘Circuit Breaker’