To find the volume of the cylindrical tanker filled with fuel, 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 of the cylinder,
- \( h \) is the height (or length, in this case) of the cylinder.
Given:
- The radius \( r = 4 \) feet,
- The length \( h = 50 \) feet.
Now, let's substitute the values into the formula:
\[ V = \pi (4^2)(50) \] \[ V = \pi (16)(50) \] \[ V = \pi (800) \]
Thus, the volume of the fuel inside the tank is:
\[ 800\pi \]
The correct answer is 800π.