A fan-shaped iron sheet with a radius of 20 cm and a central angle of 144° is rolled into a cone. What is the radius of the base of the cone in cm?
将一半径为20厘米，圆心角为144°的扇形铁皮卷成一个圆锥体，这个圆锥体的底面半径是多少厘米．
<gadget id="calculator">50.24 / 6.28</gadget>
<output>8</output>

<result>8</result>