To calculate the volume of the gas tank, which is in the shape of a cylinder, we can use the formula for the volume of a cylinder:
\[ V = \pi r^2 h \]
where \( V \) is the volume, \( r \) is the radius, \( h \) is the height, and \( \pi \) is approximately 3.14.
Given:
- The height \( h = 8 \) feet
- The width (diameter) is 6 feet, so the radius \( r \) is half of the diameter:
\[ r = \frac{6}{2} = 3 \text{ feet} \]
Now, we can substitute the values into the volume formula:
\[ V = 3.14 \times (3)^2 \times 8 \]
Calculating \( (3)^2 \):
\[ (3)^2 = 9 \]
Now, substituting back into the volume formula:
\[ V = 3.14 \times 9 \times 8 \]
Calculating \( 9 \times 8 \):
\[ 9 \times 8 = 72 \]
Now, we calculate the volume:
\[ V = 3.14 \times 72 \]
Calculating \( 3.14 \times 72 \):
\[ 3.14 \times 72 = 226.08 \]
Thus, the volume of the gas tank is:
\[ \boxed{226.08} \text{ cubic feet} \]