tourist bus and a car depart from Shanghai at the same time and drive to Nanjing along the Shanghai-Nanjing Expressway. After 3 hours, the car travels 330 kilometers, and the tour bus travels 300 kilometers. On average, how many kilometers does the tour bus travel less than the car per hour?
一辆旅游大巴和一辆轿车同时从上海出发，沿沪宁高速公路开往南京．3小时后，轿车行驶了330千米，旅游大巴行驶了300千米，旅游大巴平均每小时比轿车少行驶多少千米？
<gadget id="calculator">330 / 3</gadget>
<output>110</output>

<gadget id="calculator">300 / 3</gadget>
<output>100</output>

<gadget id="calculator">110 - 100</gadget>
<output>10</output>

<result>10</result>