Driving on the highway

Hi Rich,
the source of this problem is Manhattan GRE. I think the question is about the time...

Why would this police officer wait until the suspect was 5 miles away to begin chasing? (And how would the police officer then find the suspect?)

Let's take the numbers at face value. If the police officer is traveling at 62 mph, and you're traveling at 60mph, then the officer is making up 2 miles each hour. If the police officer needs to make up 5 miles in total, and he makes up 2 miles each hour, it will take him 2.5 hours to catch up.

R * T = D
2 * T = 5
T = 5/2 = 2.5

(Which would be the longest high-speed chase in history.)

Here's a catch-up problem from the Official Guide, if you're interested:

Car A is 20 miles behind Car B, which is traveling in the same direction along the same route as Car A. Car A is traveling at a constant speed of 58 miles per hour and Car B is traveling at a constant speed of 50 miles per hour. How many hours will it take for Car A to overtake and drive 8 miles ahead of Car B?

(A) 1.5

(B) 2.0

(C) 2.5

(D) 3.0

(E) 3.5