# Balls

Three metal balls with volumes V

_{1}=81 cm^{3}V_{2}=96 cm^{3}and V_{3}=28 cm^{3}melted into one ball. Determine its surface area.### Correct answer:

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

**arithmetic**- cube root
- square root
- third power
- exponentiation
**solid geometry**- sphere
- surface area
**planimetrics**- area of a shape
**numbers**- fractions

#### Units of physical quantities:

#### Grade of the word problem:

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