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Glencoe Math: Course 3, Volume 2

GM

Glencoe Math: Course 3, Volume 2 View details

4. Surface Area of Cylinders

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Exercise 3 Page 622

Use the formula for the surface area of a cylinder.

636.2 in.^2

Practice makes perfect

We are given a cylinder and want to find its surface area.

To calculate the surface area of a cylinder, 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. By substituting r with 7.5 and h with 6 into the formula, we can solve for S. Let's do it!

S=2π rh+2π r^2

r= 7.5, h= 6

S=2π( 7.5)( 6)+2π( 7.5)^2

▼

Simplify right-hand side

Calculate power

S=2π( 7.5)(6)+2π(56.25)

Multiply

S=90π+112.5π

Add terms

S=202.5π

Use a calculator

S=636.172512...

Round to 1 decimal place(s)

S≈ 636.2

The surface area of the cylinder is about 636.2 square inches.

Subchapter links

Guided Practice p.622

Independent Practice p.623

H.O.T. Problems p.624

Standardized Test Practice p.624-626

Extra Practice p.625

Common Core Review p.626