A and B each have to process 240 parts. They process at the same time. When A completes half of the task, B will make 20 more parts than A. It is known that A processes 30 parts per hour during this period, how many parts does B process per hour?
甲乙两人各要加工240个零件，他们同时加工，当甲完成任务的一半时，乙比甲多做20个．已知这段时间甲每小时加工30个零件，乙每小时加工多少个零件？
<gadget id="calculator">240 / 2</gadget>
<output>120</output>

<gadget id="calculator">120 + 20</gadget>
<output>140</output>

<gadget id="calculator">240 / 2 / 30</gadget>
<output>4</output>

<gadget id="calculator">140 / 4</gadget>
<output>35</output>

<result>35</result>