A line-marking machine lays down lime powder to mark two equal foul lines on a playing field. If each line for this field measures 311 feet, how many feet of lime powder will be deposited?

To answer this question, you need to understand how to understand the problem description. In this question, the machine needs to make two identical foul line that has 311feet length each. Then the total lime powder needed would be:

2 lines * (311feet/lines) = 622 feet.