Question

The volume of a right circular cylinder can be approximated as follows:

Volume = h,
where ris the radius of the cylinder and his the height of the cylinder,
It is a constant that is roughly equal to 3.
Using the simple approximation above, calculate the volume of a right circular
cylinder with a radius of 2 meters and a height of 7 meters.
O A. 84 m3
OB. 12 m
O C. 42 m3

Answer 1

B is the answer if I did it right

Answer 2

A.
`84m^3`

Step-by-step explanation:

The volume of a circular cylinder can be calculated by:

`V=h\pi r^2`

`h` is the height and
`r` is the radius.

according to the problem
`\pi` is roughly equal to 3 (it is equal to 3.1416).

Also the problem asks for the volume of a cylinder with

`r=2m`

and

`h=7m`

Using the volume formula and
`\pi=3`:

`V=h\pi r^2=(7m)(3)(2m)^2=(7m)(3)(4m^2)=(21m)(4m^2)=84m^3`

the volume is
`84m^3`