今日练习题为数学题，题目如下
A solid yellow stripe is to be painted in the middle of a certain highway. If 1 gallon of paint covers an area of p square feet of highway, how many gallons of paint will be needed to paint a stripe t inches wide on a stretch of highway m miles long? (1 mile = 5,280 feet and 1 foot = 12 inches)
A 5280mt/12p
B 5280pt/12m
C 5280pmt/12
D 5280*12m/pt
E 5280*12p/mt
正确答案：
A
解题思路：
在一条高速公路上画一道黄线，一加仑颜料能够画p平方英尺的面积，求问需要多少加仑颜料才能画一条宽度为t英寸，长度为m英里的黄线。
本题的解题要点在于单位换算上，由于题目本身已经给出了换算数据，因此按照总面积除以一加仑面积就能得出加仑数。也就是宽度t/12乘以长度m*5280再除以p。得出算式为5280mt/12p，也就是答案A。
