Police chases a driver. Originally, the police is 1 mile behind the driver. The speed of the police car is 90 mph, and the speed of the chased car is 85 mph. How long will it take for the police to catch up with the car?

12 minutes

Step-by-step explanation:

The difference in distance started out being 1 mile. The difference in speeds is 5 mph, so that 1 mile will be covered in ...

time = distance/speed = 1 mi / (5 mi/h) = (1/5) h

The police will catch up in 1/5 hour, or 12 minutes.