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Svetlanka [38]
3 years ago
9

A frustum is formed when a plane parallel to a cone’s base cuts off the upper portion as shown.

Mathematics
2 answers:
aliya0001 [1]3 years ago
4 0
The volume of a cone is
V = (1/3) π r² h
where r =  radius of the base
h =  the height.

The volume of the frustum is
(1/3)π(7.5²)(11+8) - (1/3)π(3.5²)(8)
=(1/3)π(7.5²)(19) - (1/3)π(3.5²)(8)

The 3rd choice is the correct answer.

Answer:
\frac{1}{ 3}  \pi (7.5^{2})(19) -  \frac{1}{3}  \pi (3.5^{2})(8)


inn [45]3 years ago
3 0
Option c (choice 3) is the correct choice 
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see below

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