Question 1166177
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When the tour boat leaves, Michael has been traveling for 2 hours at 9 mph, so he has gone 18 miles.<br>
The rate at which the tour boat overtakes the motorboat is (27-9) = 18 mph.<br>
The number of hours the tour boat takes to make up 18 miles at the rate of 18 mph is 18/18 = 1.<br>
ANSWER: 1 hour<br>