A cuboid water tank is 35 cm high and the bottom is a square with side length 15 cm (thickness is negligible). There is 25 cm deep water in the tank. Now insert a 50 cm long cuboid steel column vertically into the water tank so that the bottom surface of the steel column is in contact with the bottom surface of the water tank. It is known that the cross section of a cuboid steel column is a square with a side length of 5 cm, how many centimeters will the water level rise.
一个长方体水箱，高35厘米，底面是边长为15厘米的正方形(厚度忽略不计)．水箱内有25厘米深的水．现将一根长50厘米的长方体钢柱垂直的插入水箱中，使钢柱的底面与水箱的底面相接触．已知长方体钢柱的横截面是边长为5厘米的正方形，则水面会上升多少厘米．
<gadget id="calculator">28.125 - 25</gadget>
<output>3.125</output>

<result>3.125</result>