There are two cylindrical glasses, A and B, with inner diameters of 20 cm and 24 cm, respectively, containing a certain amount of water. An iron block is sunk in cup A, when the iron block is taken out, the water level in cup A drops by 6 cm; then the iron block is sunk in cup B, and the water in cup B does not overflow, then the water level in cup B How many centimeters has the water level risen?
有甲乙两只圆柱形玻璃杯，其内直径分别是20厘米，24厘米，杯中盛有适量的水．甲杯中沉没着一铁块，当取出此铁块后，甲杯中的水位下降了6厘米；然后将铁块沉没于乙杯，且乙杯中的水没外溢，则这时乙杯中的水位上升了多少厘米．
<gadget id="calculator">1_884 / 452.16</gadget>
<output>4.166667</output>

<result>4.166667</result>