Question

A drum of oil has a height of 4 ft and a radius of 1.2 ft. The oil cost $22 per ft³.

Answer 1

$397.9 is the answer, i took the test today

Answer 2

Answer

$397.90

Explanation

First, we are going to find the volume of our drum of oil. Since a drum of oil is a cylinder, we are going to use the formula for the volume of a cylinder:

$V=\pi r^2h$

where

$V$ is the volume of the cylinder

$\pi =3.14$

$r$ is the radius of the cylinder

$h$ is the height of the cylinder

We know from our problem that the radius of the drum of oil is 1.2 ft and its height is 4 ft, so let's replace the values in our formula:

$V=\pi r^2h$

$V=3.14*(1.2ft)^2*4ft$

$V=3.14*1.44ft^2*4ft$

$V=18.0864ft^3$

Now, we just need to multiply the volume of the drum of oil by the oil cost per $ft^3$:

Cost to fill the drum of oil = $18.0864ft^3*\frac{22dollars}{1ft^3} =397.90dollars$