Question 186697
Since the police car has a 3hr headstart, and is moving at 40 mph, he is 3 x 40 = 120 miles ahead of the motorcycle. To catch up this gap he has a relative speed of (60-40 = 20mph). 
So the time needed to catch up = distance/speed = 120/20 = 6 hours.
In that time he has to travel a distance = speed x time = 60 x 6 = 360 miles

Amswer:  360 miles



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