# Digging a pit

The pit has the shape of a regular quadrilateral truncated pyramid. The edges of the bases are 14m and 10m long. The sidewalls form an angle of 135° with a smaller base. Find how many m

^{3}of soil were excavated when digging the pit.## 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**- pyramid
- frustum
**planimetrics**- Pythagorean theorem
- right triangle
- triangle
- square

#### Units of physical quantities:

#### Grade of the word problem:

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