# How many

How many m

^{2}of copper sheet is needed to replace the roof of a conical tower with a diameter of 13 meters and a height of 24 meters if we count 8% of the material for bending and waste?### 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
**solid geometry**- cone
- surface area
**planimetrics**- Pythagorean theorem
- right triangle
**basic functions**- percentages

#### Units of physical quantities:

#### Grade of the word problem:

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