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Glencoe Math: Course 3, Volume 2

GM

Glencoe Math: Course 3, Volume 2 View details

2. Volume of Cones

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Exercise 4 Page 601

Use the formula for the volume of a cone.

Approximately 11.8 yd^3

Practice makes perfect

We are given a cone. Let's start by drawing it.

To find the volume, we can use the formula for the volume of a cone. V= 13π r^2 h Here, r is the radius and h is the height of the cone. We are given that the height of the cone is 3.9 yards. The radius of the base is 1.7 yards. Let's substitute these values into the formula and calculate the volume.

V=1/3π r^2 h

r= 1.7, h= 3.9

V=1/3π ( 1.7)^2 ( 3.9)

▼

Simplify right-hand side

Calculate power

V=1/3π(2.89)(3.9)

Multiply

V=1/3π(11.271)

CommutativePropMult

Commutative Property of Multiplication

V=1/3(11.271π)

MoveRightFacToNumOne

1/b* a = a/b

V=11.271π/3

Use a calculator

V=11.802964...

Round to 1 decimal place(s)

V≈ 11.8

The volume of the cone is 11.8 cubic yards.

Subchapter links

Guided Practice p.600

Independent Practice p.601-602

H.O.T. Problems p.602

Standardized Test Practice p.602-604

Extra Practice p.603

Common Core Review p.604