A professor can grade a quiz in 30 seconds. Over the course of an academic year he has 6 sections of a course with an average of 30 students with 10 quizzes in each section. If he is paid $40 an hour, how much is his annual quiz-grading labor cost to the university?
A) $60
B) $100
C) $600
D) $36,000

Question

Quizplus · Accepted Answer

The professor grades 6 sections * 30 students * 10 quizzes = 1800 quizzes. At 30 seconds per quiz, this is 1800 * 30 seconds = 54,000 seconds. Converting to hours: 54,000 seconds / 3600 seconds/hour = 15 hours. At $40 per hour, the cost is 15 hours * $40/hour = $600.

A Professor Can Grade a Quiz in 30 Seconds