A cylindrical container filled with water, the water surface is 6 cm away from the container mouth, and the radius of the bottom surface of the container is 5 cm measured from the inside. Now, a conical metal casting with a bottom surface radius of 3 cm is completely submerged in water. The mouth is 4.8 cm, find the height of this conical metal casting.
一个盛有水的圆柱形容器，水面距容器口6厘米，从里面量这个容器底面半径为5厘米，现把一个底面半径为3厘米的圆锥形金属铸件完全浸没在水中，这时水面距容器口4.8厘米，求这个圆锥形金属铸件的高．
<result>10</result>