pool has a water pipe and a water outlet pipe. The flow rate of the water inlet pipe is 6L per minute, and the volume of the water outlet pipe is 5L per minute. Only open the water inlet pipe for 25 minutes to fill the pool. If only open the water pipe for a few minutes, the pool can be filled with water. ?
一水池有一根水管和一根出水管，进水管每分钟流量是6L，出水管每分钟海量是5L，只打开进水管25分钟放满水池，如只打开出水管几分钟可以将满池水放完？
<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<result>30</result>