Guangming Village plans to build a road, which will be jointly contracted by two engineering teams, A and B. After A's engineering team finishes (1/2) of the road, B's engineering team will continue to build the rest of the road. It will take 40 days to complete. It is known that engineering team B repairs 8 kilometers more than engineering team A every day, and repairs 120 kilometers more in the next 20 days than in the first 20 days. How many days will the construction team B build the road together?
光明村计划修一条公路，由甲、乙两个工程队共同承包，甲工程队先修完公路的(1/2)后，乙工程队再接着修完余下的公路，共用40天完成．已知乙工程队每天比甲工程队多修8千米，后20天比前20天多修了120千米．求乙工程队共修路多少天？
<gadget id="calculator">120 / 8</gadget>
<output>15</output>

<result>15</result>