Driving from place A to place B, he traveled 90 kilometers in the first two hours, and traveled 48 kilometers in the third hour, and arrived at place B just in time. How many miles per hour does the car travel on average?
甲地开往乙地，前两小时行了90千米，第三小时行了48千米，正好到达乙地．这辆汽车平均每小时行多少千米？
<gadget id="calculator">90 + 48</gadget>
<output>138</output>

<gadget id="calculator">138 / 3</gadget>
<output>46</output>

<result>46</result>