Question 1146609
<br>
60 miles per hour is 1 mile per minute.<br>
In the 9 minutes between the times the truck and car enter the highway, the truck, at 60 mph, travels 9 miles.<br>
The rate at which the car overtakes the truck is 66-60 = 6mph.<br>
The time required to make up 9 miles at 6mph is 9/6 = 1.5 hours.<br>
ANSWER: 1.5 hours