Distance = Rate x Time.
The distance the officer has to make up is .2 miles. The speed at which the officer makes up the distance is the difference between the cars' speeds. That's 60 - 50 = 10 MPH.
.2 = 10 * t
.2/10 = t
.02 hours = t = 1.2 minutes = 1 minute 12 seconds.
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