SOLUTION: A truck enters a highway doing 60 mph. A car enters the highway at the same place 6 minutes later driving 67 mph in the same direction. From the time the car enters the highway, ho

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Question 384150: A truck enters a highway doing 60 mph. A car enters the highway at the same place 6 minutes later driving 67 mph in the same direction. From the time the car enters the highway, how long will it take the car to pass the truck?
Found 2 solutions by rfer, Alan3354:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
10 miles lead
overtake speed 7mph
10/7=1.43 hrs=1 hr 26 min

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A truck enters a highway doing 60 mph. A car enters the highway at the same place 6 minutes later driving 67 mph in the same direction. From the time the car enters the highway, how long will it take the car to pass the truck?
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60 mph = 1 mile/minute
The truck is 6 miles ahead when the car enters.
The car gains on the truck at 7 mph (67 - 60).
6 mi/7 mph = 6/7 hours
=~ 51.43 minutes