Question 1144333
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In the 14 minutes, the truck at 60mph (1 mile per minute) travels 14 miles.<br>
When the car enters the highway, it is 14 miles behind the truck; and it is traveling 6mph faster than the truck.<br>
The time required to make up 14 miles distance (i.e., to travel 14 miles farther than the truck and thus catch up to the truck) traveling 6mph faster is 14/6 hours, which is 14*10 = 140 minutes.