SOLUTION: A professor can grade three tests in the time it takes a student assistant to grade one test. Working together, they can grade the tests for a class in 2 hours.How long would it ta
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Question 1137052: A professor can grade three tests in the time it takes a student assistant to grade one test. Working together, they can grade the tests for a class in 2 hours.How long would it take the student assistant working alone? Found 2 solutions by josgarithmetic, ikleyn:Answer by josgarithmetic(39620) (Show Source):
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r, rate of student assistant
3r, rate of professor
The quantity of tests to grade is 1 job.
- ------------------ 1 job in 8 hours, the student assistant.