The height of a cylinder is 12 cm and its volume is 120 cm3, which is 20 cm3 larger than the volume of another cone with the same base as it. What is the height of the cone in cm?
一个圆柱的高是12厘米，体积是120立方厘米，比与它等底的另一个圆锥的体积多20立方厘米，则圆锥的高是多少厘米．
<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>