and B drive in opposite directions from the same place. A starts at 6:00 p.m. and travels 40 kilometers per hour, and B starts at 4:00 a.m. the next day. After 10 hours, the distance between the two cars is 1180 kilometers. What is the speed of car B in kilometers per hour?
甲、乙从同一地点向相反的方向行驶，甲下午6时出发每小时行40千米，乙第二天上午4时出发，经过10小时后两车相距1180千米．乙车的时速是多少千米？
<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<gadget id="calculator">6 + 4 + 10</gadget>
<output>20</output>

<gadget id="calculator">40 * 20</gadget>
<output>800</output>

<gadget id="calculator">1_180 - 800</gadget>
<output>380</output>

<gadget id="calculator">380 / 10</gadget>
<output>38</output>

<result>38</result>