# Cube into cylinder

If we dip a wooden cube into a barrel with a 40cm radius, the water will rise 10 cm. What is the size of the cube edge?

## Correct answer:

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### You need to know the following knowledge to solve this word math problem:

**algebra**- expression of a variable from the formula
**arithmetic**- cube root
- third power
**solid geometry**- cylinder
- cube
**planimetrics**- circle

### Units of physical quantities:

### Grade of the word problem:

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