A cylinder shaped drum is used to store used motor oil. The drum has a height of 3 ft and a radius of 1.5 ft. How many cubic feet of oil does the drum hold? Use 3.14 to approximate pi. Enter your answer as a decimal rounded to the nearest hundredth
Mathematics · Middle School · Tue Nov 03 2020
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To calculate the volume of a cylinder use the formula V=πr²h where r is the radius, h is the height and π is 3.14. Substitute the dimensions of the drum to get the volume. Since the drum has a radius of 1.5 ft and 3 ft in height, he formula can be written as V=πr²h > V=π(1.5)²(3). Solve for the volume.
> V=π(1.5)²(3)
> V=3.14(2.25)(3)
> V=3.14(6.75)
> V=21.195 or 21.195 cubic feet
Since the answer will be rounded to the nearest hundredth; V=21.20 or 21.2 cubic feet,
The drum holds 21.2 cubic feet of oil.