数学题：李叔叔从家骑车去横溪办事。他从家里骑车出发，用三十分钟时间行完了一半路程，这时，他加快了速度，每分钟比原来多行50米.又骑了20分钟后，他从路旁的里程标志牌上知道，必须再骑2千米才能赶到横溪，求李叔叔家到横溪之间的总路程。

数学题解答：

再算出总路程：300×30×2＝18000（米）＝18（千米）

答：李叔叔家到横溪之间的总路程是18千米。

推荐阅读：
The Common Kodi Errors and Use of Free VPN for Linux　 Java Pattern: Use Atomic Boolean to Return Single Usage Object　 Significance of HTML and CSS in Mobile App Development　 How to Reverse Words in a String using Modern Programming Langua　 The Python Function to Retrieve the Producer Reward for Witness　 Function to Compute the Average Salary Excluding the Minimum and　 Efficient Algorithms to Compute The kth Factor of a Natural Numb　 Can We Make Arithmetic Progression From Sequence of Numbers?　 How to SSH to Remote Host using the Priviate/Public Keys Authent　 How do you Test Getter and Setter Interface in Java using Mockit