A small boat sails 48 kilometers downstream and 8 kilometers upstream for the first time, and it takes 10 hours. The same time is used for the second time to sail 24 kilometers downstream and 14 kilometers upstream. What is the speed of the boat in km/h in still water?
一只小船第一次顺流航行48千米，逆流航行8千米，共用10小时，第2次用同样的时间顺流航行24千米，逆流航行14千米．这只小船在静水中速度是多少千米/小时．
<gadget id="calculator">48 - 24</gadget>
<output>24</output>

<gadget id="calculator">14 - 8</gadget>
<output>6</output>

<gadget id="calculator">24 / 6</gadget>
<output>4</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">48 + 32</gadget>
<output>80</output>

<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<gadget id="calculator">48 / 8</gadget>
<output>6</output>

<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>