SOLUTION: How do police determine how fast a car had been traveling after an accident has occurred? The formula r=25L can be used to approximate the speed r, in miles per hour, of a car th

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 Question 315443: How do police determine how fast a car had been traveling after an accident has occurred? The formula r=25L can be used to approximate the speed r, in miles per hour, of a car that has left a skid mark of length L, in feet. How far will a car skid at 55 mph? at 90 mph?Answer by malaydassharma(59)   (Show Source): You can put this solution on YOUR website!r=25L where speed r, in miles per hour, skid mark of length L in feet Or, L=r/25 car skid at 55 mph L=r/25=55/25=2.2 feet car skid at 90 mph L=r/25=90/25=3.6 feet