Cut a cylinder block into two cylinders, and the surface area increases by 100.48 square centimeters. What is the radius of the bottom surface of this cylinder block in centimeters?
将一个圆柱体木块截成两个圆柱体，表面积增加了100.48平方厘米，这个圆柱体木块的底面半径是多少厘米？
<result>4</result>