Question

What is the volume of a cylindrical ring if we know the diameter of the revolving circle is 4 ft. and the length of the center line is 65 ft.?

Answer 1

Answer:

The answer is the option A

$816.81\ ft^{3}$

Step-by-step explanation:

we know that

The volume of a cylinder is equal to

$V=\pi r^{2} h$

where

r is the radius of the cylinder

h is the height of the cylinder

In this problem we have

$r=4/2=2\ ft, h=65\ ft$

substitute the values

$V=\pi(2)^{2}(65)=816.81\ ft^{3}$

Answer 2

The formula to find the volume of a cylinder is 
V=pi r∧2 h
so your answer should be 816.81