The distance between places A and B is 360 kilometers. Cars A and B start from the two places at the same time, drive toward each other, and meet each other after 3 hours. Given that the ratio of the speed of car A to car B is 7:5, find the speed of car B.
A、B两的地相距360千米，甲、乙两车同时从两地出发，相向而行，3小时后相遇．已知甲车与乙车速度的比是7：5，求乙车的速度．
<gadget id="calculator">360 / 3</gadget>
<output>120</output>

<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">120 * (5/12)</gadget>
<output>50</output>

<result>50</result>