数学题：AB两地的路程是550千米，甲乙两车从两地同时相对而行，行了4小时没相遇，还剩20％。已知甲车每小时行60千米，求乙车每小时行多少千米？

数学题解答：设乙车每小时行x千米。

60×4＋4x＝550×（1-20%）

240+4x=440

4x=200

x=50

答：乙车每小时行50千米。

推荐阅读：
Are Top 20 Witnesses Voting Each Other? Introducing Witness-voti　 How to Design a Browser History using Double-ended Queue (deque)　 SteemJs: How Many Witnesses are Running on 23.1?　 Illustrating the Blockchain via SteemJs – Blocks are Chain　 DFS and BFS Algorithms to Find All the Lonely Nodes of a Binary 　 Three ways of Running a continuous NodeJS Application on Your Se　 K Closest Points to Origin using Custom Sorting Algorithm in C++　 Using Hash Set to Determine if a String is the Permutation of An　 Recursive Algorithm to Get Proxy Votes on Steem Blockchain　 Ways to spot SEO scam – Signs that tell you about scam SEO compa