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Glencoe Math: Course 3, Volume 2 View details

5. Surface Area of Cones

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Exercise 33 Page 638

Use the formula for the surface area of a cylinder.

1583.4 ft^2

Practice makes perfect

We want to calculate the surface area of a cylinder with a radius of 12 feet and a height of 9 feet. To do that, we can use the following formula. S=2π rh+2π r^2 In this formula, r is the radius of the base and h is the height of the cylinder. Substituting r with 12 and h with 9 into the formula, we can solve for S. Let's do it!

S=2π rh+2π r^2

SubstituteII

r= 12, h= 9

S=2π( 12)( 9)+2π( 12)^2

▼

Evaluate right-hand side

CalcPow

Calculate power

S=2π( 12)(9)+2π(144)

Multiply

S=216π+288π

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