下面是2014年4月13日的SAT官方每日一题的内容，是关于数学方面的，题型是数学选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。下面我们就一起来看一下这个SAT官方每日一题吧。

　　Read the following SAT test question and then click on a button to select your answer.

　　A train traveling 60 miles per hour for 1 hour covers the same distance as a train traveling 30 miles per hour for how many hours?

　　A 3

　　B 2

　　C 1

　　D 1/2

　　E 1/3

　　Explanation

　　When the speed of a train in miles per hour is multiplied by the travel time in hours, the distance traveled by the train is obtained. The distance that the first train travels is 60 miles per hour times 1 hour, which is 60 miles. Using the variable X for the travel time, in hours, of the second train, the distance that the second train travels is 30 miles per hour times X hours, which is 30X miles. Since the two trains travel the same distance, 60=3X,which gives X=2 hours, the travel time of the second train.

　　以上就是关于2014年4月13日的SAT官方每日一题中数学选择的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。