An ostrich runs 54.3 kilometers per hour and a truck travels 45.7 kilometers per hour. How many kilometers faster is the ostrich than the truck?
一只驼鸟每小时跑54.3千米一辆卡车每小时行45.7千米．鸵鸟的速度比卡车快多少千米？
<result>8.5</result>