A police car traveling south toward Sioux Falls, Iowa, at 160 km/h pursues a truck traveling east away from Sioux Falls at 140 km/h. lkmh Slollx Falls \ \ .1' At time t = O, the police car is 50 km north and the truck is 30 km east of Sioux Falls. Calculate the rate at which the distance between the vehicles is changing at t = 10 minutes. (Use decimal notation. Give your answer to three decimal places.)