a police cruiser, approaching a right-angled intersection from the north, is chaing a speeding car that has turned the corner and is now moving straight east. When the cruiser is 0.6 miles north of the intersection and the car is 0.8 miles to the east of the intersection. The police determine with radar that he direct distance between them and the car is increasing at 20 mph. If the cruiser is moving at 60 mph at the instant of measurement. what is the speed of the car?