A conical container with a height of 12 cm is filled with water and poured into a cylindrical container with the same bottom and a height of 8 cm. What is the height of the water surface of the cylinder in cm?
一个高12厘米的圆锥形容器，盛满水后倒入和它等底、高是8厘米的圆柱形容器里，该圆柱水面的高是多少厘米．
<result>4</result>