Two cylindrical containers, A and B, have a bottom area ratio of 5:3, the water depth of A container is 20 cm, and the water depth of B container is 10 cm. Then pour the same amount of water into the two containers so that the water depths in the two containers are equal. How deep is the water in centimeters?
甲、乙两个圆柱体容器，底面积比为5：3，甲容器水深20厘米，乙容器水深10厘米．再往两个容器中注入同样多的水，使得两个容器中的水深相等．这时水深多少厘米？
<gadget id="calculator">20 - 10</gadget>
<output>10</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

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

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">25 + 10</gadget>
<output>35</output>

<result>35</result>