1. Volume of Cones & Spheres

2. Cone
V = 1/3 (π r2 h)
To calculate the volume of a cone. 1. Square the radius
Multiply by height
Divide by 3 (which is the same as multiplying by 1/3)
Leave answers in terms of π.

3. Find the volume of the cone.
V = 1/3 (π r2 h)
V = 1/3 (π) (42) (6)
V = 1/3 (π) (16) (6)
V = 1/3 (π) (96)
V = 32 π inches3

4. Find the volume of the cone.
V = 1/3 (π r2 h)
V = 1/3 (π) (52) (10)
V = 1/3 (π) (25) (10)
V = 1/3 (π) (250)
V = 831/3 π m3

5. Sphere
V = 4/3(π r3)
To calculate the volume of a sphere. 1. Cube the radius
Multiply by 4
Divide by 3
Leave answers in terms of π.

6. Find the volume of the sphere.
V = 4/3 (π r3)
V = 4/3 (π) (23)
V = 4/3 (π) (8)
V = 32/3 (π)
V = 102/3 π ft3

7. Find the volume of the sphere.
V = 4/3 (π r3)
V = 4/3 (π) (73)
V = 4/3 (π) (343)
V = 1372/3 (π)
V = 4571/3 π inches3
Find the radius.
r = 7 m