# The conical roof

The conical roof above the warehouse has a diameter of the lower part (base) d = 11.2 m and a height v = 3.3 m. How many rectangular steel plates with dimensions of 1.4 m and 0.9 m were needed to produce this roof if the seams and waste required an increase in their consumption by 10 percent?

### Correct answer:

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

**arithmetic**- division
- rounding
**solid geometry**- cone
- surface area
**planimetrics**- area of a shape
- rectangle
**basic functions**- percentages

#### Units of physical quantities:

#### Grade of the word problem:

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