Answer:
The car passed the truck after 60 minutes.
Explanation:
We should first find how far the truck was from the entrance to the highway when the car entered (after 11 minutes). We know that the distance travelled is the product of the time and speed, therefore, the location of the truck is given by
.
Now we can build functions representing the distance from the entrance of both vehicles, in respect to the time travelled.
Truck's Function
Car's Function
Finally, we can equalize both functions to find out at what time the car passed the truck (when their graphs intercepted):