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Glencoe Math: Course 3, Volume 2

GM

Glencoe Math: Course 3, Volume 2 View details

5. Surface Area of Cones

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Exercise 29 Page 638

Use the formula for the surface area of a cylinder.

150.8 ft^2

Practice makes perfect

The given solid is a cylinder.

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 3 and h with 5 into the formula, we can find the value of S. Let's do it!

S=2π rh+2π r^2

r= 3, h= 5

S=2π( 3)( 5)+2π( 3)^2

▼

Evaluate right-hand side

Calculate power

S=2π( 3)(5)+2π(9)

Multiply

S=30π+18π

Add terms

S=48π

Use a calculator

S=150.796447...

Round to 1 decimal place(s)

S≈ 150.8

The surface area of the cylinder is about 150.8 square feet.

Subchapter links

Guided Practice p.634

Independent Practice p.635-636

H.O.T. Problems p.636

Extra Practice p.637

Standardized Test Practice p.638

Common Core Review p.638