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Glencoe Math: Course 3, Volume 2 View details

5. Surface Area of Cones

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Exercise 32 Page 638

Use the formula for the surface area of a cylinder.

911.1 m^2

Practice makes perfect

We want to calculate the surface area of a cylinder with a diameter of 10meters and a height of 24meters. To do that, we can use the following formula. S=2π rh+2π r^2In this formula, r is the radius of the base and h is the height of the cylinder. Since we know that the diameter d equals 10meters, we can calculate r by dividing the diameter by 2. r=10/2 ⇒ r= 5m By substituting r with 5 and h with 24 into the formula we can find the value of S. Let's do it!

S=2π rh+2π r^2

SubstituteII

r= 5, h= 24

S=2π( 5)( 24)+2π( 5)^2

▼

Evaluate right-hand side

CalcPow

Calculate power

S=2π( 5)(24)+2π(25)

Multiply

S=240π+50π

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