A cylinder-shaped vase has a height of 12 inches and a diameter of 4 inches. What is the volume of the vase? Use 3.14 for [tex]\pi[/tex]. Round to the nearest tenth.



Answer :

Sure, let's break down the problem step-by-step.

1. Identify the given values:
- Height of the vase (h) = 12 inches
- Diameter of the vase (d) = 4 inches
- We will use 3.14 as an approximation for π (pi).

2. Calculate the radius of the vase:
- The radius (r) is half of the diameter.
- [tex]\( r = \frac{d}{2} = \frac{4}{2} = 2 \)[/tex] inches

3. Use the formula for the volume of a cylinder:
- The formula for the volume (V) of a cylinder is [tex]\( V = \pi r^2 h \)[/tex].
- Substitute the known values into the formula:
[tex]\[ V = 3.14 \times (2^2) \times 12 \][/tex]

4. Calculate the area of the base:
- First, compute [tex]\( r^2 = 2^2 = 4 \)[/tex].

5. Calculate the volume:
- Now, substitute [tex]\( r^2 \)[/tex] into the formula:
[tex]\[ V = 3.14 \times 4 \times 12 \][/tex]
- Multiply the values:
[tex]\[ V = 3.14 \times 48 = 150.72 \text{ cubic inches} \][/tex]

6. Round the volume to the nearest tenth:
- The volume 150.72 rounded to the nearest tenth is 150.7 cubic inches.

So, the radius of the vase is 2 inches, the unrounded volume is 150.72 cubic inches, and the volume rounded to the nearest tenth is 150.7 cubic inches.