A cylindrical cup is filled with 30 liters of water, and an iron cone with the same height as the bottom is put into the water, how many liters of water will overflow.
在一个圆柱体杯中盛满30升水，把一个与它等底等高的铁圆锥全部放入水中，将有多少升水溢出．
<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<result>10</result>