Question: A teacher started grading. The first one took him 90 minutes but the second took only 76.5 minutes to complete. Realizing that learning effects are

A teacher started grading. The first one took him 90 minutes but the second took only 76.5 minutes to complete. Realizing that learning effects are at work, how long will it take the teacher to finish grading for the entire class of 30 students? Round up your answer to nearest whole number. Enter numeric value only, no commas.

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