The height of a cylinder is 12cm, and its volume is 120cm**3, which is 20cm**3 more than the volume of another cone with the same base as it. What is the height of the other cone in cm?
一个圆柱的高是12cm，体积是120cm**3，比与它等底的另一个圆锥的体积多20cm**3，则另一个圆锥的高是多少cm．
<gadget id="calculator">120 - 20</gadget>
<output>100</output>

<gadget id="calculator">120 / 12</gadget>
<output>10</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">100 * (3/10)</gadget>
<output>30</output>

<result>30</result>