# 3rd dimension

The block has a surface of 42 dm

^{2}, and its dimensions are 3 dm and 2 dm. What is the third dimension?## Correct answer:

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

**algebra**- quadratic equation
- equation
- expression of a variable from the formula
**solid geometry**- cuboid
- surface area

### Units of physical quantities:

### Grade of the word problem:

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