Two masters and apprentices overhaul a 360-meter pipeline. The master’s overhaul speed is 15 meters per hour, and the apprentice’s overhaul speed is 10 meters per hour. How many hours will it take for the two to cooperate?
师徒二人检修一条360米的管道，师傅的检修速度为15米每小时，徒弟的检修速度为10米每小时，二人合作需要多少小时完成？
<gadget id="calculator">15 + 10</gadget>
<output>25</output>

<gadget id="calculator">360 / 25</gadget>
<output>72/5 = around 14.4</output>

<result>72/5 = around 14.4</result>