A water leakage accident occurred in a ship. The captain immediately arranged to use two pumps to pump water out at the same time. At that time, 600 barrels of water had leaked in. One pump pumped 18 barrels per minute, and the other pump pumped 22 barrels per minute. After 24 minutes After pumping out the water, how many barrels of water will the ship leak in per minute.
一艘轮船发生漏水事故，船长立即安排用两部抽水机同时向外抽水，当时已经漏进了600桶水，一部抽水机每分钟抽水18桶，另一部抽水机每分钟抽水22桶，经过24分钟把水抽完，这艘轮船每分钟漏进多少桶水．
<gadget id="calculator">18 + 22</gadget>
<output>40</output>

<gadget id="calculator">40 * 24</gadget>
<output>960</output>

<gadget id="calculator">960 - 600</gadget>
<output>360</output>

<gadget id="calculator">360 / 24</gadget>
<output>15</output>

<result>15</result>