a pA police cruiser, approaching a right-angled intersection from the north, is chasing a speeding car that has turned the corner and is now moving straight east. When the cruiser is 0.6 mi north of the intersection and the car is 0.8 mi to the east, the police determine with radar that the distance between them and the car is increasing at a rate of 20 mph. If the cruiser is moving at a constant speed of 60 mph, what is the speed of the car