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

The answer is the option A

`816.81\ ft^(3)`

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