# Calculate 19443

Calculate the height of the cylinder when r = 10 mm and S = 800 mm

Calculate the radius / r / of the cylinder when the height is 20 mm and S = 1000 mm

^{2}.Calculate the radius / r / of the cylinder when the height is 20 mm and S = 1000 mm

^{2}.## Correct answer:

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

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

### Units of physical quantities:

### Grade of the word problem:

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