A cylinder, if its height increases by 2 centimeters, its lateral area increases by 25.12 square centimeters. What is the radius of the base of the cylinder in cm?
一个圆柱，如果它的高增加2厘米，侧面积就增加25.12平方厘米．这个圆柱的底面半径是多少厘米．
<gadget id="calculator">25.12 / 2 / 3.14 / 2</gadget>
<output>2</output>

<result>2</result>