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The problem is asking for the **volume of a cylindrical pipe**.

### Formula for the volume of a cylinder:
\[
V = \pi r^2 h
\]
Where:
- \( V \) is the volume.
- \( r \) is the radius of the cylinder.
- \( h \) is the height (or length) of the cylinder.

### Given:
- Radius \( r = 2.5 \, \text{cm} \).
- Length \( h = 28 \, \text{cm} \).
- Use \( \pi = 3.14 \).

### Step-by-step calculation:
1. Square the radius:
   \[
   r^2 = (2.5)^2 = 6.25 \, \text{cm}^2
   \]
2. Multiply \( r^2 \) by \( \pi \) and the height (length):
   \[
   V = 3.14 \times 6.25 \times 28
   \]

I'll now compute this.The volume of the pipe is approximately **549.5 cm³**. When rounding to the nearest natural number, the volume is **550 cm³**.

Would you like more details or have any questions?

Here are some related questions to explore:
1. How would the volume change if the radius of the pipe were doubled?
2. How can you calculate the surface area of this cylindrical pipe?
3. What is the effect on the volume if the height is halved?
4. How would the formula change if the pipe were hollow?
5. How does changing the value of \( \pi \) to a more accurate approximation (like 3.1416) affect the final result?

**Tip:** When solving volume problems, always ensure the units are consistent throughout the calculation.

The radius of a pipe is 2.5 cm. If the pipe is 28 cm long, what is its volume?

Learn how to calculate the volume of a cylindrical pipe with a radius of 2.5 cm and length of 28 cm. This guide uses the volume of a cylinder formula V = πr^2h and rounds the answer to the nearest natural number. Suitable for students in Grades 6-8.

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