A mathematics application problem urgent I! Fang Hua's family has a 40 cm long and 25 cm wide glass fish tank with a water depth of 20 cm. One day, Fang Hua accidentally dropped a 10 cm square iron block into the tank. How many cm will the water surface rise? But also the solution ideas and the meaning of each formula! It's up to, remember, it doesn't seem to be up to how many centimeters!

The rising water surface is due to the addition of cube
First calculate the cube volume, 10x10x10 = 100 cubic centimeter
The size of the water rise is
1000 ÷ (40x25) = 1cm
Up to 20 + 1 = 21 cm

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