# Eight

Eight small Christmas balls with a radius of 1 cm have the same volume as one large Christmas ball. What has a bigger surface: eight small balls or one big ball?

## 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
- comparing
**solid geometry**- sphere
- surface area

### Units of physical quantities:

### Grade of the word problem:

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