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A police cruiser, approaching a right-angled intersection from the north, is chasing a speeding car that...

A 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 1 mi north of the intersection and the car is 1 mi to the east, the police determine with radar that the distance between them and the car is increasing at    2–√     mph. If the cruiser is moving at 60 mph at the instant of measurement, what is the speed of the car?.

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