100
A police cruiser approaching a right-angled intersection from the North, is chasing a speeding car that has turned around the corner and is now headed East. When the cruiser is 0.6 miles North of the intersection and the car is 0.8 miles to the East, the police determine that the distance between them and the car is increasing at a rate of 20 mph. If the cruiser is moving at 60 mph at this instant, what is the speed of the car?
70 mph