A driver is traveling at a constant velocity of 15 m/s and passes a region where the speed limit is becomes 10 m/s. A policeman is taking radar where the speed limit changes. The policeman accelerates forward at 3 m/s^2 just as the driver passes this point. How much time has passed before the policeman catches the driver? O Os O 10s O 15s15s O 1.5s

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