There are three pipes A, B, and C. Pipe A flows out 20% salt water at a flow rate of 4 grams per second, pipe B flows out 15% salt water at a flow rate of 6 grams per second, and pipe C flows out 10% salt water at a flow rate of 10 grams per second. flow out of the water. After tube C is opened, it does not flow for 2 seconds, then flows for 5 seconds, then stops for 2 seconds, and then flows for 5 seconds...The three tubes are opened at the same time, and they are all closed after 1 minute. The resulting mixture contains 100% salt Several?
有A、B、C三根管子，A管以每秒4克的流量流出含盐20%的盐水，B管以每秒6克的流量流出含盐15%的盐水，C管以每秒10克的流量流出水．C管打开后开始2秒不流，接着流5秒，然后又停2秒，再流5秒…三管同时打开，1分种后都关上，这时得到的混合液中含盐百分之几？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 * 60 * (1/5)</gadget>
<output>48</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">6 * 60 * (3/20)</gadget>
<output>54</output>

<gadget id="calculator">48 + 54</gadget>
<output>102</output>

<gadget id="calculator">4 * 60</gadget>
<output>240</output>

<gadget id="calculator">6 * 60</gadget>
<output>360</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">40 + 2</gadget>
<output>42</output>

<gadget id="calculator">10 * 42</gadget>
<output>420</output>

<gadget id="calculator">240 + 360 + 420</gadget>
<output>1_020</output>

<gadget id="calculator">102 / 1_020</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/10) * 1</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>