cuboid water tank, measured from the inside, is 25 cm long, 20 cm wide, and 30 cm deep. The water tank already contains water with a depth of 6 cm. Now put a cube iron block with a side length of 10 cm in the water tank. Ask about the water tank How many centimeters has the water level risen?
一个长方体水箱，从里面量底面长25厘米，宽20厘米，深30厘米，水箱里已盛有深为6厘米的水，现在水箱里放入一个棱长为10厘米的立方体铁块，问水箱里的水面上升多少厘米？
<gadget id="calculator">7.5 - 6</gadget>
<output>1.5</output>

<result>1.5</result>