Question 9 • Algebra II
Max mows 1/45 of the lawn per minute, and Jan takes twice as long, or 90 minutes, so Jan mows 1/90 of the lawn per minute. Together their rate is 1/45 + 1/90 = 2/90 + 1/90 = 3/90 = 1/30 of the lawn per minute. Therefore, they take 30 minutes, which is choice A, 30.0 minutes.
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