Option D:
is the volume of the cylinder
Explanation:
Given that the cylinder has a radius of 14 m and a height of 6 m
We need to find the exact volume of the cylinder.
The formula to determine the volume of the cylinder is given by

Let us substitute
and
in the above formula, we have,

Squaring the terms, we get,

Multiplying we have,

Thus, the volume of the cylinder is 
Therefore, Option D is the correct answer.