Divide a cone into two identical parts along the diameter of the base. The surface area is 60 square centimeters larger than the original. The height of the cone is 5 cm. What is the radius of the cone in centimeters?
将一个圆锥沿底面直径分成完全相同的两部分，表面积比原来多了60平方厘米，圆锥的高时5厘米，圆锥的半径是多少厘米？
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">2 / 5 / 2</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<result>6</result>