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

The answer is the option A

Step-by-step explanation:

we know that

The volume of a cylinder is equal to

where

r is the radius of the cylinder

h is the height of the cylinder

In this problem we have

substitute the values

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8