VOLUME OF A CYLINDER
Many objects are made in the form of a cylinder. Coke cans, water pipes,
gasoline storage tanks, boilers, and silos are only a few of the many cylinders you
see everyday. You should be able to think of at least five other examples of
cylinders.
You may think of a cylinder as being made by
piling one circular base on top of another
until the height you want is reached.
For example, if you stack a group of coins on top of each other you will have a
cylinder. A stack of quarters will be a cylinder with a radius of about 1/2 inch.
You can say that the volume of a cylinder is the area of the base times the
height.
Volume Area x Height
Since we already know that the area = π r2 the formula for the volume of a
cylinder is written:
Volume = r π 2h
r
Of course, when you use the formula to find the volume of the cylinder, you must
make certain that r and h are in the same units of measurement.
SOLVE:
Find the volume of a cylinder if r = 5 inches and h = 12 inches.
V = π _______________ x ________________
π = 3.14
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