The ratio of the heights of two cones with equal base radii is 7:4. It is known that the volume of the first cone is 49 cm**3, and the volume of the second cone is cm**3.
两个底面半径相等的圆锥，它们高的比是7：4，已知第一个圆锥的体积是49cm**3，第二个圆锥的体积是多少cm**3．
<gadget id="calculator">49 / 7</gadget>
<output>7</output>

<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<result>28</result>