# Decreases 5625

How much percent will the surface and volume of the cube decrease if the diagonal decreases by 10%?

b) if the diagonal increases by 10%?

b) if the diagonal increases by 10%?

### 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**- square (second power, quadratic)
- third power
**solid geometry**- cube
- surface area
**planimetrics**- diagonal
**basic functions**- percentages

#### Units of physical quantities:

#### Grade of the word problem:

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