A sports car at point A drives down a straight stretch of road CD. A police car at point B uses radar to measure the speed of the car, and obtains a reading of 80 km/h. For the position of the car given below, determine the speed of the car. Note that the 80 km/h speed measured by the radar gun is the rate of change of the distance between the car and the radar gun.
The car is 30% of the distance from point C to point D.
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