A cylinder with a perimeter of 20 cm is divided vertically into two identical pieces along the diameter of the bottom, and the surface area is increased by 100 cm2. What is the volume of the cylinder in cm3?
将一个底面周长是20厘米的圆柱体木块沿底面直径竖着剖分成相同的两块，表面积增加了100平方厘米，这个圆柱体木块的体积是多少立方厘米．
<result>250</result>